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HANDBOOK

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THOMPSONSUBMACHINE.

GUNMODEL OF 1928MODEL OF 1921

ThompsonSemi-Automatic Carbine

MODEL OF 1927

AUTO-ORDNANCECORPORA TION

302 BROADWAY

NEW YORK, N. Y., U. S. A.

CABI..~ ApPRF.~~: "AUT08OCO -NEW YORK"

Printed In U. S. ..-\.

4th Ed,.'ioH- -Jnuunry, 19f!9

THOMPSON SUBMACHINE GUN'--

I. Nomenclatnre of Parts..................... 7

II

TholllpSOIl SlIhlllachilll' GIIII~ arc lIIadc illJ\I()(Iel1921 alld 1\lodel ]928. (For COIIVCllicIICI',thcsc arc sometimcs l)csil!lIatcll 1\lol)el No. 21Aalld Model No. 28A.) .i\lodcls 21AC alld 28ACarc cquipped with Culls Compcllsators.

The Modcl 1921, whcn fircd full-automatic.fires at the cyclic rate of ahout 800 shots pCI'minute.

The illude! 1~28 tires at a cyclic rate uf ahout600 shots per minute.

TABLE OF CONTENTS

Part Pal?;e

I I. Directions for Operatin~ Gun...............

III. Ammuuitiou aud Ballistics 21

IV. Geueral Description of Gun alHI Operating"Principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2()

V. Directions for Dismounting ami Assemhling' 39

X. Carrying' Eqnipnll'nt and Ac('('ssoril's.... 5X

The genera] inst ructiOlls contained herein arethe same for r.Jode!1928 as for Mode1192I.

While the principles of design are identical inhoth models, the following parts of Model 1921:\are different in construction from the correspond-ing parts of the 1921 :Model, viz.: Actuator, Re-coil Spring, Buffer, Firing Pin Spring.

On some 1928 models, the foregTip .is horizon-tal instead of vcrtical. Sce page 51.

Type XX (20-cartridge) box magazines arenot identical for l\Todel 1921 and Model 1928.\Vhen ordering, be sure and specify for whichmodel wanted.

VI. Directions for Care ane! T'resel'\'ation 46

VII. Data 49

VIII. Moe!eI192Ran(1 Cutts lonl)H'nsator....... 51

IX. ~rodel 1927 Carhine 55

NOTEThe directions and pre-

cflutio1lJ contained hereinshould be carefully notedbefore operating the gun.

All type L (SO-cartridge) drum magazines callhe used with r.Jodel 1921 guns, but oilly thoseL:ype L lIIaga:::illes which arc lIIarked "TVilld to 9Clicks" should he used «,itlt tlte Model /928 yltIlS.Type "C" (loa-cartridgc) drum magazines arefor l\lode! 1921 Suhlllachillc guns only, and can-nut be used with l\Iode!1928 guns.

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Part ILiST OF COMPONENTS OF

THOMPSON SUllMACHINE GUNCALIBRE AS

L Actuator.*2. Barrel.J. Bolt.4. Breech Oiler (inchuling Felt Pa(ls).5. Buffer (including Fiher Discs).*(,. Buffer I'ilot.7. Disconnector.8. Disconneclor Spring.9. Ejector.

10. Extractor.I L Firing Pin.12. Firing Pin Spring. *13. Fore Grip.14. Fore Grip Screw.15. Frame.ICJ. Frame Latch.17. Frame I.alch Spring.IX- Grip Mount.19. Hammer.20. I'[ammer Pin.21. Lock.22. :\1agazine Catch.23. :\1agazine Catch Spring.24. I'i""l Pia Ie.25. Rear (;rip.2(i. I{ear Grip Sen'w.27. I{eceiver.28. Recoil Spring..29. Rocker.30. I{ocker Pi\'ol or Fire Control Lever.31. Safety.32. Scar.33. Sear Spring. 3r,. Trigger.3-t. Sear Lever. 37. Trigger Spring.35. Sear Le\'er Spring.38. Trip.*

*Tht}!;(' parts or 1110«1(>11921 do not interchnnge with correspond-

ing partR or model 1928.

Note-- These numbers correspond to numbered partsshown on plates II and III and following text.

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THO },I P SON SUB ~l A CHI N E GUN

MAGAZINES

Type XX BoxBody.Follower.Spring.Floor Plate.

~lagazinc (20-cartridge).

Type L 11agazine (SO-cal-tridgeBody, assembled.Cover, assembled.Rotor, assembled.\"/inding Key, assembled. *Body Clip.*

Type C Magazinc (IOO-cartridgeBody, assembled.Cover, assemblcd.Rotor, assembled.\Vinding Key, asscmbled.*Body (.Iip.*

drnm) .

drum).

S [G HTSFront Sight (assembled to barrel).

I~ear Sight.Eye Piece.l{ear Sight Base (asscmbled to rccein>r).Sight Base Pin.Sight Plunger.Sight Plungcr Spring.Sight Lcaf (with slide retaining pin).Sight Slide.Sight Slide Catch.Sight Slide Catch Screw.\Vindage Screw, assembled.

Consisting of: \Vindage Screw.Windage Screw Collar.vVindage Screw Collar Pin.

*Thesc parts are idenlical for both Type I. and

Type C 1lagal.incs.

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APPENDAGES AND ACCESSUHlES

Bull Stock complete, consisting of:

Bull Stock (strippcd).

Bull Stock Slidc Gruup.

Eutt Stock Slide.Butt Stock Catch.Butt Stock Catch l'in.Butt Stock Catch Spring.Bull Stock Scrcw, largc.Bull Stock Screw, small.

Bull Plate Group:

Butt Plate (stdwell).Butt Plate Cap.Eutt Plate Pin.Butt Plate Spring.Butt Plate Spring Scrcw.Butt Platc Screw, large.Butt Platc Screw, small.

Cleaning Rud.Brass \ Vire Brush.Oil Can.

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THO ~[ p SON S U 13~I A C \-! I N E GUN---

Part IIDIRECTIONS FOR OPERATING

GUNThe gun may be set for either full-automatic

or single shot lirc. It is provided with sightsand a detachablc butt stock. Three types ofmagazines having capacities of 20, 50 and100 cartridges, respectively, may be used.

It is possible to fire the Submachine Gunfrom the hip either full-automatic or singleshot, with any of thc magazines, with or with-uut the butt stock attachcd. Even though therocker pivot is set for full-autumatic fire,single shots may be obtaincd by a quick rc-lease of the trigger for each shot.

[t is also possible to use the gun for aimedfire from the shoulder, either full-automatic orsingle shots, with any of the magazines.

SightThe sight is graduated up to 600 yards for

the 230-grain bullet cartridge. The effectiverange of the weapon with this standard am-munition is about 350 vards. With tracer ammu-nition very good results can be secured up to the600 yards range. The eyepiece is laterally ad-justable to corrcct for windage and drift. Forrapid firing with the sight Icaf down a 50-yardopen sight is provided (Point 13Iank).

Thc index line on the eyepiecc to "zero"for latcral adjustmcnt is omitted in manu-facturc to allow for individual determinationof this point. After this point has been satis-factorily dctermincd it is suggested that a line

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he placed un the eye-piece indcx fill""cr with asharp kniic ur uther sharp instrumc~t.

The personal elemcnt of holding the gungreatly affects the accuracy of fire, and con-scqucntly there may be a considerable varia-tion in hits when the same sight scttin" is usedhy ditTcrcnt persons. l-Jolding thc gUI~ looselyt~nds toward. shooting high. On page 50 thesIght correctIOn for onc ioot at thc variousranges is tabulated. It will aid in judgingthese small measurements to bcar in mind thattJ-~e thickn~s? of the projec!ion on the sightsltde contall1l11g the battlc sIght notch is .05-inch, and that the thickncss oi the cyc piecc isalso .OS-inch.

The natural tcndency of all automatic riflcs,cspccially in bursts of firc, is to raise the muz-zle; that of thc avcragc marksman is to shoothigh; conscquently the submachinc gun shouldbe sighted slightly low, with a fine siO'ht (thctup oi ,the front sight just appearing inbthe bot-tom ot thc peep or opcn sight), in order to ob-tain maximum accurate results. The slightlyupwa~'d an~ to the right tendency of this gun.especially 111bursts of fire, can be correctedhy a small amount of practice on thc part ofthc gunncr, in holding stcady.

Thc Thompson Gun should bc uscd prin-cipally semi-automatic, i. C., a single shot forcach pull of the triggcr. A rate of fire of 100aimcd shots can bc casily obtained in oneminutc in this manncr. For full-automaticpurposes, or like a machinc gun, the gunshould bc fired in succession of bursts of threeto six shots at a timc for most accurate results.

TO FIREFirst bc sure gun is well clean cd and oiled

with sufficient oil on the oil pads of the breechoiler (4).

?-'?en SET SIGHT. The sight is set byr:lIsmg the leaf and sliding the slide to therangc dcsircd. Latcral correction (right orleft) is obtaincd by turning the small thumbscrew.

To Fire - Semi-Automatically (A SingleShot for Each Pull of the Trigger).

The normal method of firing the ThompsonSub.machine Gun is semi-automatically, i. e.,a .smgle shot for each separate pull of thetngger. To accomplish this first cock thc bolt(3) by grasping the actuator (I) with the lefthand and pull it rcarward as far as possible.i. e., until it clicks twice. Note: IT IS NECES~SARY TO I-lAVE THE BOLT COCKEDBEFORE EITHER THE SAFETY LEVER(31) OR TI-IE FIRE CONTI{OL LEVER(30) CAN BE TURNED TO THE POSI-TION DESIRED. It is advisable to turnthc safety lever (31) to the safe position. thatis. so that it points rearward. Then turn thelire control lever (30) so that it also pointsrearward. The rear end of the gun is towardsthc butt. The piece is now in its cockedposition for semi-automatic fire but lockcdwith the safety lever (31) on.

Facc the target pointing the barrel in "eneraldirection of range and inscr~ loaded m~gazineof ~I~e type desired. When in thc properposItIon thc magazinc will click in place. Inthe case of the hux type magazine (see Plate

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IV-Page 9) it is pushed upward iuto the;;ro~ve a.t the end of the trigger guard untilIt clicks lI1tu plar~. '!'!le 50-capacity, Type L,and the lOO-capaclty, 1 ypc C Drum fI'Iagazines(see Plate 1V-Page 9) arc inserted fromI~ft to right into the horizontal grooves of thep.lec~ as sh?wn on Plate 1V, Page 9, the dis-~111~tlOn be111g that the 20-capacity magazineIS 111serted ~1[)\vard or vertically whilst the~lrum magazll1es arc inserted sidewise or hor-IzC?ntally. In all cases be sure and push mag-aZ111es well uP. or in so that the magazineca!ch can snap 111tOposition and hold the mag-~z;.ne"securely: Then s~t the safety (31) to. lire. by turn111g the satety lever (31) so thatIt 1~0.111tsforward towards the muzzle at theposItIOn. mar.ked "Fire." Pull the trigger andrelease 1t q!t1ckly for each shot desired.

To Fire-Full-Automatically.

At the shorter ranges the Thompson Gun~an be ~red very ef~ectively full-automatically,1. e., (lI~e a. mach111e gun) by following theabove (hre~tlOns for semi-automatic fire, with~he exceptIOn that th~ fire control lever (30)IS set for full-automatIc fire, i. e., with the firecontrol lever (30) pointing forward or towardsthe muzzle. In firing full-automatically it is~vell to remember that the prescribed methodIS by b.ursts of a few shots at a time, that is,hy pulling the trigger until you have fired three

!~ .ten shots <~nd then releasing the trigger.I h~s method IS called full-automatic fire by

Imlsts. After eath burst of fire rearrange aimand continue in ~his manner a.s may be desired.

In order to msert magazmes, to set the

safety lever (31) or to set the fire control lever(30) the bolt must be in its rearward or re-tracted position in all cases.

POSITION. The standing position whenfiring full-automatically is very important.The left foot is well advanced. The left kneeis bent with the weight of the body leaningforward, resting on the left foot. The trunkof the body is twisted or turned, thus push-ing the right shoulder into the direction of thef1re, and the right shoulder is humped andtense. It is as if a man was trying to push anautomobile, that had been stalled along theroad, with his right shoulder. The resistancewhen fired full-automatically is not great andsurprisingly small with the *Cutts Com-pensator, but the right shoulder must bepushed into the gun by turning the trunk atthe hips and humping- the shoulder. A fewtrials will give remarkable results to anyonewho is at all acquainted with shooting. Therecoil is very slight but the rapid accumulationof these slight recoils in full-automatic lirewill tend to push the operator backward, if heis not well braced for the thrust and will con-sequently affect the accuracy of fire. Theprone position (lying down) is better for ac-curacy of fire.

In firing from the hox magazine the bolt willautomatically be held in the open positionwhen the last shot has been fired therefrom.In both drum magazines the bolt closes on theempty chamber after the last shot has been

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*Cutts compcnsator is a special dc\ice fitted on cnd

of guns to decrease the tendency of muzzle rising. Itis furnished on guns specially fitted for same on order.

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Ii red and a ra tt ling nuise can be hcard in thescmagazines which !ndicates thcy are empty.

Loading of Magazincs (Scc Plate V)Box Magazincs

The normal capacity of a box magazinc is20 cartridgcs. j t may be pussihk tu force anextra cartridgc intu the magazinc, but thisshould be a voided.

The cartridges iced into the magazine withcase and withuut binding. jf for any reasonexcessi ve furce is rcquircd tu feed the car-tridges out of the magazine, the energy ofthe bolt is taxed tu such an extent that amisfire may result. The forward edge of themagazine is roundcd tu prcvent loading car-tridges backward.

The lips of the muuth of the box magazineshould be a distance uf .55-inch apart. j f byaccident the magazine mouth shunld becumedeformed. the lips shunld be carefully bcntback to this dimension.

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Drum Magazines (See Plate V)To load a drum magazine, remuve thc

winding key by lifting the flat spring thereonand sliding the key off. The cover can thcnbe removed. Place the cartridges, bullet up,into the spiral track of the body, beginningwith a full section at the mouth. The sim-plest method to begin loading is to fill oneouter section and then rotate the rotor untilthis section reaches the mouth. Thereafter,continue to fill successive se~tions ~ntil theend of the spiral track has been reached. Filleach section complete,' do not skip any sectioll

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alld du /101 Jill beyolld Ihe elld of Ihe spiral lrack.In ordcr to obtain a capacity of 100 car-

tridges in the Type C magazinc, a cartridgcshould be placcd in each oi thc iour fingcrspreccding thc mouth.

Plate 1V shows thc l11agazincs properly till-ed. Follow closely the arrangement of car-tridges shown.

After the magazine is properly filled replaccthe cover and key and wind to the numberof clicks indicated on the magazine nameplate.

Caution: Drum magazines when wound tothe number oi clicks indicated on their cascs.namcly, nine clicks for 1928 U. S. Navy l\lode]C;uns and ele\'en clicks for l\lodel 1927 Car-hines and Model ]921 Submachine Guns.should not be re-\\'ound 'liter many shots havcheen fired. That is to say, a loaded magazinewhich has heen wound up should not he fireda few shots and then rewound. as the resultantstrong spring tension will hath interfere withsurety oi action oi thc gun, as wcll as incurringthe possihility oi hrcaking oi the main springof magazine.

PRECAUTIONS

you are rcady to lire l:ai~~ gu.n. to ~houlderand set safety (.H) to "lIrc posItion; 111otherwords. whcn thc 1c\'er is pointing forwar~1.Apply thc same prccaution~ for ful.l-~ll1tomatlctire making surc of the dcslrcd posItIOn of thetire control lever (30).

4. Du not place the triggcr finger withinthe trigger guard until you arc rcady tu fircand h;;,'c the gun puinted toward thc target.

5. Whcn vuu stop firing sct the safcty (31)to "safe": r~move the magazine by prcssingup with your right thumb on .the. magazinccatch handle. Grasp the magazll1e 111the lefthand when it is released by raising the mag-azine catch (22). [n an emcrgency where greatspccd of fire is dcsircd ;lI~d it ~s necessary to«uickly replace the magaz1l1e wIth anothc: thebox magazine will fall tu the ground of Itselfupon the releasc of the ma.gazin~ catch (22).See that there arc nu cartndges 111the cham.her beiore yuu turn from your firing position.

6. \Vhen not in operation the bolt shouldbe closed. i. e.. in its forward or uncockedposition, bill closed Oil all ell/ ply chamber.

7. Each timc beforc firing. reassure your-sclf as to thc type of fire that is desired,

,whcther full-autumatic or single shot and makecertain that the fire control le\'cr (30) is setaccordingly.

8. Make it a practice to see that chamberis clear by looking through ejection opening.

9. For anticipated action carry the gunwith holt cocked (retractcd) and safety on.Othcrwisc holt should hc left ill closed positioll"11 cmpty chambcr, to relic\'c straill un rcc"ilspriug. Tu close boll UII ell/ply chamber, rc-

I. It is deemed advisable to habitually setthe gun at the "Safe" position while changingthe magazines and during lulls in firing.

2. Do not attach loaded magazine until youare ready to fire. See that the magazine isloaded and attached properly.

3. \Vhen getting ready to fire semi-autu-matically make certain your fire control lever(30) is set to "sing]e" and your safety (31) to"safe" before attaching magazine. Just before

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1II07IC 1II(/f}(/::iJ/c and let holt go forward slow-ly by retarding adnator knoh with left hand.Unless magazine is n:movcd, the bolt if releasedwill fire cartridge from loaded magazine ASTI-lIS GUN FIRES ON THE FORWARDSTRUI, E OF T1-I1~ BOLT.

10. For night operation. remember thatwith both the safety (31) and lire control lever(30) in forward direction the gun is ready foriull-automatic fire.

II. Do not snap holt (>n empty chamberun n ecessari Iy.

12. In single shot fire release the triggerquickly after each shot to reengage the sear.as each pull of the trigger delivers but a singleshot.

13, \Vhen firing full-automatically lire inhursts of threc to tcn shots.

MALFUNCTIONSIn case of a misfire, due tu faulty .ulImllni-

tion or otherwise. rctract or cock the bolt witha sharp quick pull on thc actuator knob. Thisshould insure ejection of the misfircd cartridge.

In case oi any other malfullction, retractthe bolt as aboyc and clear the throat andchambcr of the gun by turning the gun overon its side and letting thc case or cartridge rolluut. If nccessary rcmO\'e the magazinc quicklyand thc cartridgc or casc will fallout from thebottom, \Vhile manipulating the gun underthese circumstances it is deemed highly ad-yisable to always set the gun at "Safe."

Remelnber you must first cock the pieceby pulling" the :lduatClr handle all the way backbefore inserting nlagazincs or setting the firecontrul and safety levers.

Part III

AMMUNITION AND BALLISTICSFOR CALIBRE .45 THOMPSON

SUBMACHINE GUN MODELS1921 and 1928

The United States Army automatic servicepistol model of 191I fires calibre .45 pistolball cartridges with a bullet weighing 230-grains. This is alsu standard ammunition forthe Thompson Submachine Gun, calibre .45.models oi 1921 and 1928. The Thompson Sub-machine Gun, Model 1921 only, also functiOllsequally well wtih commercial calibre .45 Coltautomatic pistol cartridge, the ]ndlct of whichweighs ZOO-grains. The ZOO-grain lmllet givesa slightly increased velocity but is not as ac-curate at the longer ranges in this gun.

There is also provided for use in the calibre.45 Thompson Submachine Gun models of 1921and 1928 Peters-Thompson birdshot cartridgescalibre .45. Each cartridge contains 120 number 8birdshot. These cartridges are slightly longerthan the regular pistol ball cartridges and re-quire a special box magazine similar to thetype XX 20-capacity cartridge magazine pro-vided for the pistol ball ammunition, exceptthey arc a little longer to accommodate theslightly increased length of the Peters-Thomp-son cartridge. The Peters-Thompson shot car-tridges and magazines arc used in the Thomp-SOli Submachine Guns without any changes oralterations being necessary except to use specialmagazine. The extreme rallge oi the I 'eters-

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tion, the guns of this type usually being pro-vided with hipods and heing of heavier weight.

Thompson shot cartridge is ahout 150 jeet. Theyg-ive a spread oj a circle ahout six !"cl'! in diamekrat a rang-e oj 50 jel'!. In loading the Peters-Thompson cartridge into special box magazinecare must be taken to exert no pressure onpaper carton bullet portion of cartridge. Thepressure to load cartridges into magazine mustbe placed on the metal case.

The regular Colt calihre .-1-5pistol hall car-tridges of either the military or commercialdesign can he readily purchased from repre-sentatives of the leading cartridge manufac-ttlrers of the United States such as the Rem-ington Arms Company. 25 Broadway. NewYork City; The Peters Cartridge Company.Cincinna ti. Ohio: \ Vi nchester Repeating ArmsCompany, New I faven, Conn.; U. S. CartridgeCompany. III Broadway. New York City and\\'estern Cartridge Company. East Alton. Ill.The Peters-Thompson shot cartridge is madeby The Peters Cartridge Cumpany. I n caseammunitiun cannot he secured with facilitythe Auto-Ordnance Corpuration. 302 Broad-way. New York City, will gladly furnish sameor give infurmation enahling the purchaser tosecure his ammunition for Thompson Sub-machine Gun with the least possible delay.

It is also to he noted that the ThompsQnSubmachine Gun mechanism can he made upin quantities on special order for higher power-ed and pressured ammunition than indicatedhere. when desired. The Thompson Suhma-chine Cun mechanism can also he iurnishcdto fire high po\\'ered military ser\'lce amnlllni

Sight Setting

The sight on the TIHllnpson SuhmachineCun, .r.lodds I~21 and I~2~, is g-rad uated for the230 grain Iml1ct ammunition.

\Vhen firing the 2oo-grain bul\et ammuni-tion the fol\owing sight settings should beused:

For 100200300400500

set atset atset atset atset at

RO yards.175 yards.270 yards.Yi5 yards.4W yards.

yards,yards,yards,vards.)'ards,

The windage graduation is such that oneunit of graduation will give a correction ofone funt on a one-hundred-yard target.

Sight COl'rcelioll for Elevation

Correction on sig-ht in decimals oj an inch forone foot elevation on targ-l'! at rang-es indicatedfor standard 22.3-inch sight radius.

Rangc,Yar<b

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lIeight of Trajectory at Points Indicated

RAN(;E so 100 ISO 200 2S0 300 350 400 450 sonYards \'<1s. Yds. Yds. Yds. Y<ls. Yds. Yds. Yds. Yds. Yds.

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croo

.40 0'n;Z

200j 1.40 1.90 1.5S 0~= 300 2.S5 4.2S 5.00 4.W 2.95 0

o,E 400 .1.9S 7.00 9.20 10.12 9.80 8.20 4.90 0;:; 500 S.58 10.20 14.00 16.50 17.70 17.60 IS.86 12.50 7.15 0

- - - - - - - - - - -c (100 .40 0.- ~200 1. 22 1.65 1.35 0:-:",

~= ~300 2.30 3.75 4.40 4.08 2.72 08..5 400 3.50 6.25 8.12 I).OS 8.1)0 7.3S 4.S2 0

""lsoo 4.'10 1).05 1l..10 14 .SS IS. 7S IS.58 14 .o.! IO.M5 6.00 0

--

Drift to Right of Line of Bore of Gunat Points Indicau:d

A:\L\IU- 50

I

lOa/150 200 250 300 /350 400 450 500

:'\lTIOi': Yds. YdS., Yds. Yds. Yds. Yds. Yds. Yds. Vds. Yd..

--

Ft.1 Ft.1 Ft. Ft. Ft. Ft. Ft. Ft. Ft. Ft.!.IO-grain

bnllet.. 0 I .25 .50 .85 1. 40 2.30 3.25 4.50 5.90

I

.10/lOO-grai n

bullet.. 0 .15 .35 . is 1..15 2.15 3.15 4.35 6.10 8.05

THO:MPSON sun ~IA CHI N E GUN THOMPSON S U I3 ~I A C H r N E GU~

Folluwing tablcs gi\'c thc hcight of thctrajectory and drifts of the 230-grail1 and ofthe 200-grain bullet.

Height of Trajectory Ahove Lineof Sight for Standal'd Ammnnition

Table of PClIctration

The remaining energy of thc bullet at thcvarious ranges is shown in thc following tablein which the figures show the number of ;Y.:i

inch yellow pine boards spaced one inch apart,that werc penetrated by bullets from the firingpoints indicated.

:\umhcr of 'Y.Iiuch boards pcuctratcd iron,firing points indicatcd:

100 200 JOO 400Yards Yards Yards Yards

6 5)4 4~ 4

Amlllunition Point230.grain Blank

IHlllcl. . . . . 6~ZOO-grain

bullct. . . .. 6h 5Y4 5 40 J~ 3~;;

LJ. S. Govcrnmcnt Frankiord Arsenal cal. .45Traccr Cartridgcs arc uscd in conjunction withrcgular 230 grain bullct cartridgcs to indicateranging oi shots at the longer rangcs from 350 to600 yards. Tracer cartridges are not sold com-mcrcially in small lots.

NOT E: Do not usc cOlllmcrcial cartridgcs with200 grain bullets in ~lodcl 1928 guns.

500Yards

3~

Table of Drift

Page t Ive..tv.four Page t",e..tv.fi'"

THO :\1 I' S 0 ~ S L.;B :\1 A CHI N E GU~ T 1-(0 :\1 I' SON SUB:\I A (" II I N I": GLJ~

Part IVGENERAL DESCR£PTION OF GUN

AND OPERATING PRINCIPLE

tu the chamber and as near as pussible tu theaxis of the bore.

The luck (21) consists of an "1"1" memberwith lugs extending on each side thereoi. Thcsides uf the lock (21) engage with the bult,(3), and the lugs thereun engage with gruovesin the receiver (29). The central bar is en-gaged by the actuator (I) fur control by therecoil spring (28) and for manual operatiun.

The suriaCt.~s between the bult (3) and lock(21) are at an angle of 70 degrecs to the axisof thc gun, and the surfaccs between the lock(21) and receiver (27) at an angle of 45 de-grees to thc axis, so that there is formed onthe lock (21) an intercepted anglc of 25 de-grecs between the bolt (3) bearing and re-ceiver (27) bearing suriaccs of thc lock (21).

The explosivc pressure uf the cartridge istransmitted through thc forward cnd uf thebolt (3) tu thc lock (21), and thruugh the lock(21) to the locking surfaces of the receiver(27). The bolt (3) is limited in its forwardtravcl by the abutment on the forward end ofthe rcctangular section of the bolt (3) abuttingagainst the curresponding abutmcnt in the rc-cci ,ocr (27). j n thc portion of thc bol t (3)between this abutment and the lock (21) ispin)ted a hammer (19) in thc form of a rc-vcrsed le'"cr. The lower end of this hammer(19) strikes the abutment in the receiver (27)slightly in advancc of thc bolt (3). The uppcrcnd of the lever contacts with the firing pin(II) which cxtends through the round forwardportion of thc bolt (3) to the cartridgc seatand is held in rearmost position hy the firingpin spring (12). The hammer (1<)) is so con-

(N ote numbers correspond to parts shownon Platcs I rand] [T, pages 5 and 6.)

The gun is composed of two distinct groups:the NcccivC/' (27) with the parts attached there-(.1 and contained thcrein. and the /;"{/II/C (IS)with its attached and contained parts.

The Reeeivcr Group"

The recciver (27) forms the skeleton of thegun and has the barrel (2) screwed thereon.Immediatcly bcneath the barrel (2), at thefront end uf thc recci,"cr (27), is anchurcd thefurc grip muunt, tu which is secured thc foregrip (13). Thc forc grip muunt (18) is hcldin place by thc barrel (2).

Thc rccci,'cr (27) immcdiately to thc rearof the barrcl (2) is provided with an openingfor magazines and with a bult wcll. Beyundthc magazine upening is a uniform cnlargedc;L\"ity which contains thc body of the )>ult (3).with recoiling space for the samc. alsu thc re-coil spring (28) and huffer (5).

Thc holt (3) consists of a rcctangular bodyportion which fits into the c;,,"it,. in thc re-ccivcr (27). anrl a round forwardiy projectingportion which fits into the forward bolt wellof the recei vel' (27)" The forward cnd of thebolt (3) being of a reduced sizc permits themagazine to be brought up in cluse proximityIJage t u!cnty-aix I'uUt' tWt'uill-s,ven

T II 0 ~1 P SON S U U 11 1\ CHI N E GUN

struded that it will strike the abutment of therecei vcr (27) a nd cause the discharge uf thecartridge only when the bolt (3) is completelylocked.

The actuator (1) rests slidably on tup of thebolt (3) and engages the cross-bar of the lock(21) with two fingers; the rear finger also en-gages the forward end of the recoil spring(28). The cavity in the rectangular portion ojthe bolt (3) forms a housing for the recuilspring (28), and the butTer (5) serves as anarbor therefur. The buffer (5) consists of acylindrical tube closed at the forward end andhaving a flange at its rear end. This flangefurnishes a seat for the rear end of the recuilspring (28) and a buffing abutment for therear end of the bolt (3). The buffer (5) ismounted on the buffer pilot (6); a column offiber discs is interposed between the forwardend of the buffer (5) and the buffer pilot (6),so that all pressure or shock on the buffer (5)is transmitted to the. buffer pilot (6) throughthese buffing discs. The buffer pilot (6) has aliange which seats against the rear end of thereceiver (27) and is held in place by its pro-longed end of reduced diameter fitting into ahole in the receiver therefor.

Held in place by the buffer pilot (6) and ex-tending forwardly in undercuts in the re-ceiver is a breech oiler (4) formed of springsteel which holds oil saturated felt pads to re-lubricate the locking lugs on the lock (21) ateach recoil of the bolt (3). These pads alsotend to keep the sides of the bolt (3) lubri-cated.

The principle of bolt action is this, thatI'llge IU't'llty.,.igltt

T II 0 111I' SON S U II ~I \ C II I N E GUN

during the peri..d ..i high chamber pressurethe I..ck (21) is lixed in pusitiun by adhesiunoj its suriaces and mo\'es to clear the lockingsurfaces in the receiver (27) only after the highpressure in the chamber has subsided. Theangle uf the lock (21) is so chusen that at thenlOment the lock (21) is muved clear of thereceiver locking surfaces, there is only suffi-cient residual powder pressure in the chamberto blow the cartridge case and the bolt (3)rearwardly, eject the empty case and impartsufficient inertia to the bolt (3) to completelycompress the recoil spring (28) and preparethe bolt (3) for a new cycle of operation. Onits forward movement, under impluse of therecoil spring (28), the bolt (3) feeds a car-tridge from the magazine into the chamberand as the bolt (3) approaches its foremostposition, the lugs on the lock (21) engage theforward surfaces of the receiver (27) lockinggrooves, which in conjunction with the recoilspring (28) pressure on the lock (21) throughthe actuator (1), drives the lock (21) down-wardly into locked position.

The receiver (27) is provided on the rightside with an ejection opening in a plane 30degrees above the horizontal. In this sameplane the forward end of the bolt (3) is pro-vided with an extractor (10) secured by an un-(lcrcut and limited in horizontal movement bya stud. The extractor (10) is retained in itsa.ssell1bled position under its own spring ten-sIOn.

The opposite side of the receiver (27) is pro-vided with an ejector (9) which is screwed in-to place and secured in position by a projec-

Pag~.tw#!nlY'flit1e

THOMPSON SUB 1\1 1\ CHI N E GUX

tiun on the end uf a spring leaf engaging witha detent on the receiver (27). The ejector (9)extends into the path of the bolt (3), a clear-ance cut on the bolt (3) being prm'ided there-for.

A t the rear end the recei vcr (27) is providedwith a projection which contains the framelatch (16) and frame latch spring (17). Thismember locks the frame (15) to the receiver(27) when the fortner is assembled thereto.

The parts tlms far mentioned comprise thereceiver group, which with the exception ofthe fore grip mount (18), the fore grip (13)and screw (14), and frame latch (16) withits spring. composes the working parts of thegun.

The Frame GronpThe frame (15) houses the entire trigger

mechanism, furnishes a seat for the rear grip(25). an attachment for the hox magazine, andcontains a catch to hold the latter in place.The rear projection of the frame (IS) is alsoprovided with a guideway, to which the buttstock can be attached.

Of greatest importance in the trigger mech-anism group is the sear (32) which underimpulse of the scar spring (.B) engages one ofthe sear notches in the bolt (3) when the latteris in retracted position. The trigger (36) ismounted in the frame (IS) forwardly of thesear (32). and carries pivotally mounted on arearward projection thereon the disconnector(7), which under impulse of the disconnectorspring (8) is continually urged toward thesear. (32). The forward portion of the triggerPag, tldrtv

THO ~[ P SON S U II ~I A CHI N E GUX

(36) houses trigger spring (37), which urgestrigger (36) to its normal released position.

Surrounding the upper portion of the trig-ger (36) and mounted on the same pivot, thetrip (38) extends forwardly into the path ofthe box magazine follower, and rearwardlyover a forwardly projecting member of the dis-connector (7). The relation of trip (38) to dis-connector (7) is such that when trigger (36) ispulled, the trip (38) (when the last shot has beenfired from the box magazine) will be lifted by thefollower of magazine and will move disconnector(7) away from scar lever (34), thus allowingsear (32) to engage bolt (3) to hold it "open."

JJctween the scar (32) and the discunnector(7) is interposed the scar lever (34) mountedun the same pivot with the sear (32). The searlever (34-) is urged duwnwardly by the searlever spring (35). The disconnector (7)when moving upwanlly, by a pull on the trig-ger (36) lifts the sear lever (34), and the scarlever in turn lifts the forward projection of thesear (32), causillg the rear projection to be-come depress~d and disengaged from the bolt(3). The bolt (3) is then free to move for-ward under impulse of the recoil spring (28)and will reciprocate in automatic action untilthe cartridges are exhausted. or the trigger(36) is released. or the bolt (3) is arrested inits retracted position by the action of the fol-lower of the bux magazine on the trip (38)when the last cartridge has been fed from thebox magazine. In this last-mentioned instancethe disconnector (7) will be disconnected fromthe sear lever (34), which will be free to re-

I'age lltirtll-one

THOMPSON SUBMACHINE GUN

sume its normal position and will in turn al-low the sear (32) to re-engage the bolt (3).

Between the trigger (36) and sear (32) thereis provided a rocker pivot (30) which carriesa rocker (29) mounted on an eccentric portionthereof. This rocker (29) extends upwardlywhen the rocker pivot (30) is set for "auto-matic" or "Full-Auto" position to within a veryshort distance of the bolt (3). The forwardedge of the rocker (29) rests against the dis-conncctor (7). When the rockcr pivot (30)is rotated through an arc of 180-degrees to the"semi-automatic" or "single" position, the ec-centric axis of the rocker pivot (30) causes therocker (29) to project upwardly into thc pathof the bolt (3). There is provided on the but-tom of the bolt (3) a groove to clear therocker (29), of such lcngth that the rcar wallof this groove will strikc the rocker (29) at thefinal stagc of the forward movcment of thebolt (3). imparting to the rocker (29) sufficientllIovcmcnt to cause it to throw thc disconnector(7) forwardly and discngage same from thescar lever (34). The scar lever (34) immediate-ly under impulse of the scar lever spring (35)assullles its normal position, leaving the scar(32) free tu engage the bolt (3) in retractedpusition.

The iunctiun of the scar lever is this:That as the bolt (3) has reached its furwardpositiun and has caused the rocker (29) tudisengage the disCllnuector (7) from the scarlever (34.) if the scar le\'cr (34) were not freeto move dowllward. thc disconnector (7) mightre-engage the s~ar (32) when the bolt (3)starts rearwardly on its recoil, and the searPage thirtv,two

THOMPSON S U II ~I A CHI N E GUN

(32) would then not bc free to re-engage thebolt (3).

The position of the rocker (29) controls thenature of fire of the gun, whether full-automaticor single shot. The rocker pivot (30) can beturned from "automatic" or "full-auto" to "sellli-alltomatic" or "singlc" positioll, Oldy 'whcn bolt(3) is retracted.

It can be turned in the rcverse directionwith the bolt (3) closed. but to avoid con-fusion the bolt (3) should always be rctractedwhen sctting the rocker pivot (30) in eithcrdircction.

The safety (31) is mounted at the rcar cndof the sear (32). It consists of a cylindricalhody with its ccntral portion halvcd to clearthe scar (32). The scar (32) is provided at therear end with a half hole to cngage the safcty(31). '\Then the safety (31) is turncd to "safc"position it cngages thc scar (32) so that thelattcr is positivcly blocked against mo\'emcnt.\,Vhcn thc safety (31) is turncd to "fire"position, the half section of its body is rotatedout of cngagcment with the scar (32) and thesea I' (32) is frce to move,

Thc safety (31) can be turned to "saic"position only whcn thc scar (32) is in engagement with the bolt (3) in its retracted positilJll,01wiously sincc this is an open chamber gun.that is, the bolt (3) when released by the trig-ger pull loads and immediately fires thc car-tridge, the gun with the bolt (3) resting inforward position is completely inadi\'(',

The pivut pin (24) for the trigger (36) andtrip (38). and the pivot pin (24) for the sear(32) and sear lcver (34) are both sccured to a

Page thirlv./IIr,.

T J-! 0 ~[ I' SOX S U U ~I r\ CHI N E GUX

spring plate, which is provided with projectingspring fingers engaging grooves on the safety(31) and the rocker pivot (30), retaining theseparts in assembled position.

The forward end of the frame (15) is pro-vided with a dovetail cut, which engages a cor-respunding dovetail member of the box maga-zine. On the side of the frame (15) is pivotedthe nlagazine catch (22) urged into engage-ment with the magazine by a torsion spring.This magazine catch (22) engages the boxmagazine by a stud extending forwardlythrough the center of the trigger guard; andalso holds the drum magazines in position bythe engagement of its forward edge with anotch un these magazines.

The rear grip (25) is secnred to the frame(15) by means of the rear grip screw (26).The fra me (15) is assem bled to the recei ver(27) by undercut ways engaging correspond-ing ways un the recei \'er (27). \\'hen theframe (15) is in foremost position on the re-ceiver (27) the frame latch (16) pocketed atthe rear end uf the receiver (27) is free underimpulse of the frame latch spring to projectdown\\'ardly into engagement with the frame(15). locking same to receiver (27).

Magazines (See Plales I V and V)

The Box Maya::;ill~' has a capacitv for t\\'ent\'cartridges in double culullln. It consists of a~ortl.1ed she~t metal hody with a dm'etail pro-Jectl~JI1 un Its rear edge fur engagement withthe trame and a hule therein for en(Ta"ement.

I I . 0 0Wit 1 t 1e magazll1e catch. This rearwardly ex-

Page thirty-foltr

THOMPSON SUB ~I 1\ C IT I N E r;UN

tending dovetail also furnishes a path for arear projection on the follower for contactingwith the trip to canse the bult tu he held openwhen the last shot is fired frum the magazine.

The folJower serves as a tahle for the car-tridges in the magazine and is urged upwardhy the magazine spring. which is supported atthe bottolll of the magazine hy the fluor plate.This magazine consists of the fuur parts men-tioned: the budy. fulluwl'1'. Illagazine springand fluor plate.

The Dr/till i\!a[j{l::;ill1's, Ty/,1' I. alld 1'')'/,1' C,consist uf circular pan-like hudies providedwith cO\'ers. Rotatahlv nwunted un a hubwithin the magazine i~ a rotur tu which isattached a spring case huusing a mutur spring.To a flange on the hub is attached a ratchetconsisting of a circular disc, so cut that fourfingers are formed thereon and gi\'en a curva-ture to project heyond the plane uf the ratchet.These fingers of the ratchet engage with in-wardly protruding edges furmed in the bodyof the magazine in such a manner that thefingers of the ratchet will pass O\'er the pro-jections when the huh is rutated in windingdirection, and wilJ abut on these projectionswhen the huh is turned in uppusite directiun.The motor spring is fastened on its iuner endto the huh. and on its outer end to the springcase.

The relation of these parts is such thatwhen there are cartridges in the magazine.so that the rotor is not free tu rotate. and thehub is turned in a feeding direction. the motuI'spring will hecome wuul1<1 up and the fingerson the ratchet engaging. the prujectiuns un

l'Ilflr lhirly.Jit'c

T II 0 .\1 I' SON SUB .\1 1\ C I-I I N E GUN T 1-10 .\f P SON SUB .\1 A C' H I N E GUN---

the hlldy will hllid the hub irllll1 ul1wil1ding.The el1ergy ui the I1lOtor spring is then exertedthrough the spring case to the rotor tq urgethe cartridges to the mouth of the magazine.

Buth the body and the cover of the maga-zine arc provided with guide strips whichiorlll a spiral path for a train of cartridgesplaced parallel to the axis of the hub. Therotor is provided with radial fingers which oc-cupy the space in the magazine between theguide strips uf the body and the cover. Thesefingers are so constructed that they inter-cept the spiral train of cartridges in such amanner that a\1 the sectors are of equal length;that is, the distance between fingers on theinncr row of the spiral train is the same as onthe outer row of the spiral train. In this man-ner a group of cartridges between fingers onthe inner spiral train occupy the same spacebetween fingers on the outer row of spiraltrain; the cartridges throughout the train beingat all times held compactly to prevent themfrom tumbling, In the larger magazine of thetwo (Type C) the fingers of the rotor at theirext reme end are of such width that a pocket isprovided therein for a cartridge in the outerpath of the spiral train,

The magazine body and cover are providedwith an opening which forms the mouth ofthe magazine: the train of cartridges is herearrested by deflectors which guide each car-tridge upward into the mouth ready for feed-ing illto the chamher. The body and covey arcalso provided with side plates secured on theopposite sides which engage guideways there-for in the receiver for attaching the magazine

lherdo, The side pblc (111the nlagazine bodyis provided at the botlunl with a notch for en-gagement with the magazine catch to holdthe magazine in position on the gun. The hubis secured to the magazine body with a springclip. The cover is secured by a winding keywhich fastens to the end of the hub and bymeans of which the motor spring is wound.

The drum magazines are of two sizes::-'1agazine, Type L, of a 50-cartridge capacity,and i\1agazine, Type C, of a lOa-cartridgecapacity. (Type C is not made for Model 192K)

Sights

Sights are pro\'ided for use in connectionwith the butt stock to fire the gun from thcshoulder.

The frollt sight consists of a one-piece mcm-ber secured to the front end of the barrel witha p111.

The rear sight consists of a base which isriveted to the top of the receiver. The baseis provided with side walls to protect the sight.I t has a ccntral housing for the plunger andplungcr spring, and at its rear end it carriesthe sight leaf pivotally mounted thereon. Thcpivot end of the leaf is cylindrical and is pm-vided with "V" slots for engagement with theplunger undc,: pressure of the plunger spring.These "V" slots are so located that the plungerengages therewith when the leaf is in the "up"IIr in the "down" position and serves as a de-tent to hold thc leaf in these two positions.

On the leaf is mounted a slide which is heldill position by a small studded leaf springsecured 011 the edge thereof, the stud engag-

IltlV~ I!til"ly x1.r /Jao, thirty ,'(rl't"

THO!lII'SOi\ SUB :\1 1\ C 11 I ~ I~ GLJi\ THO ~[ l' SON SUB :\1 ,\ C j[ I i\ E GUX

in'" with serratiuns on the edge uf the leaLIh~ujecting frum the slide is a forward wallnutched for a battle sight and two laterallu"'s which sU!>])(Jrt a windage scrcw. This

b .I

.Iwindagc scrcw carrics thc cyeplccc w lIC 1 ex-

tcnds bclow thc slidc. The cyepiecc has anopening for a licld vicw an<! an apcrtl!re f~rsi<rhtin g'. Thc upper end ot the eyepiece bb ..provided with. a sui~able edge .101' carrYlllg anindex JlIark lor wllldage adjustment. 1m-mediately abuve this edge on the battle sightwall is the windage graduation.

Part VDIRECTIONS FOR DISMOUNTING

AND ASSEMBLINGTO DISMOUNT

Rcad Prt'C(ll/liOIlS (a) a(l([ (b), [lag'! 45.

Butt Stock

1. Rcmove MagazineRemove magazine by pressing upward with

right thumb on magazine catch.

2. Remove Frame from ReceiverTurn safety to "fire" positiun and rocker

pivot to "automatic" or "full-autu" position.Pull the trigger and allow holt to go forwardgradually by retarding actuator with left hand.

Place gun upside duwn un knee ur un atable, the barrel extending rearward. andsteady against mo\'ement with the actuatorknob. \Vith thumb of left hand depress framelatch at rear end of the frame and with righthand tap frame sliding same rearward a shortdistance. Take the gun frum tahle ur knee.grasping rear grip in right hand. and graspingreceiver with left hand fllll trigger and slideframe off to the rear.

3. Rcmove Recoil SpringSupport muzzle of barrel Ull table or knee.

with open side of recei \'er faci ng- upera tor.Grasp receiver with left hand, with thumb inposition to engage the huffer. \\'ith thumb ofrig-ht hand press down on buffer pilot whichprojects heyond end of the receivcr. and withthumb of left hand cngage the Hange of bufTcr.I f the breech oiler folluws. push same back

To fire the "un frum the slwulder there isprovided a butt stuck which can be. readilyattached to the frame, a catch locklllg thesame in place,

The butt stock consists oi a black walnutbody. !\ slide which fits the frame of thegun' is secured tu the frunt end of. the. b()(IXby means of two screws. On this shde ISmuunted the catch to lock the butt stuck telthe frame.

At the butt end the stock is provided witha pocket for an o!1 can. and a butt plat;, issecured thereon with twu wood screws. 1 hehutt plate is provided with a small circula.rhinged cap which serves as a door tll the elllcan pocket.

I'lIgl' thirtv-pigh'I-age thirly-nint

THOMPSON S U II :-.r A C 1-1 I N E GUN THO :-'1 I' SON SUB ~I i\ C H J K E GUN

with thc fingers of right hand. Holding thebuffer and pilot down with thumb of left handgrasp thc end of buffer pilot with thumb andforefinger of right hand and withdraw thiscntire unit from the recei\'er.

Care should be taken to obtain a firm holdun thc spring, buffer and pilot to prevent therecoil spring (same being cumpressed) fromspringing out of operator's hand.

4. Remove Bolt, Lock and Aclualor fromReceiver

pivut plate and withdraw the rocker pi\'ut;then ren1U\'e the rocker.

Again using the actuator, but steadying thehand with thumb against trigger g-uard topre\'ent excessivc mo\'ement, depress the longlinger of the pivot plate "nd withdraw safely.

7. Remove Pivol Plate and Firing Ml'f'h.anism from Frame

J lold frame upright with the grip in righthand. Press simultaneously with both thumbson the two pins of pivot plate. These pinsproject sufficiently far so that by a quick pres-sure thereon the body portion of the pivot;Jlate will extend on the other side far enoughto enable grasping same with fingers for with-drawal.

While withdrawing pivot plate with righthand, press down on the trigger and scar withleft thumb to rclease pressure of springs onpivot pins to facilitate withdrawal.

The remaining components of the firing-mechanism are then free to be removed. Thedisconnector can be removed from thc triggerby simply withdrawing samc.

Grasp rcccivcr bottom up with left hand.~Iide the bolt into rearnwst positiun and with-d ra w.

Slide actuator with lock to forcmust positionand remove lock through inclined luckinggTOO\'CS in receiver.

Then again slide actuator to rearmost posi-tion and withdraw samc.

5. Remove Ejeetol' and Breech Oiler fromReceiver

The cjcctor can be rcmovcd by lifting theleaf sufficicntly to discngagc thc dctcnt andunscrcwing the same from recciver. Thcbreech oilcr can be removcd by pressing itslingers together to clear undercut of the re-cei \'er. These two parts. huwever. nced not beremuved for ordinary cleaning purposes.

6. Hcmove Safety, Rocker Pivot and Rocker.

from Framc

8. Remove Magazine Calch from FrameIf required the magazine catch can be with-

drawn from frame by rotating same COUllter-clockwise to its limit. Except for good reasonsthe magazine catch should not be removed, toavoid unnecessary straining of the magazinccatch spring,

9. Remove Firing PinDrive hammer pin out of bolt from left side;

the hammer, firing pin and firing pin spring willPage forllJ O"t

Using the end oj the actuatur as a tool inthe right hand depress thc short fingcr of the['ag. forllJ

THO }.[I' SON SUB ~I i\ CHI ~ E GU\: T II () ~I I' SON S U 1\ ~I i\ t' II I ~ E l; lJ ~

- --

then tend tu spring uut under in1JH!be uf thefiring pin spring. Caution should be exercisedtu prevent these parts irom spnnglllg awayand becoming lost.

10. Rcmovc Exlraclor from Boll\Vith a cartridge case or some ()ther means

lift the extractor head sufficientlv for the stud'tu clear its scat and withdra~\' hy pullingforward. Caution shoud he exercised not tolift the extractor head excessi,'elv to preventsetting.

.

TO ASSEMBLE

depn:ss the long- tinger of pi ,'ot plait' and pushsaiety home. Turn safety to "fire" position.

!'Iace the rocker in position in frame ,vilhflat side against sear lever. Insert rocker pivotfrom the left side of frame. \\'ith acluaturdepress the short finger of pivot plate and pushrocker pivot home. Turn rocker pivot to "auto-matic" or "full-auto" position.

3. Asscmhlc Ejcctor 10 Rcceiver~rrew ejector into receiver until stud on !l'af

engages and scats in depression therdor. f)u

IlOt screw or Ill/screw ejectur ,('hile bult is iI/closed positiol/.

4. Asscmhlc Exlraelor lo Boil

Slide extractor into plan:. liiting head to dearstud.

5. Asscmhlc Firing PillPlace firing pin into firing pin Spril1" and

slide same into front end of bolt. Pla~e thehammer in position. with rounded edge up-ward, and drive hammer pin into place.

6. Asscmhlc Actuator, Lock and Boil loReceiver

Grasp receiver, bollom up. with left handand insert actuator with knob to the front. SJideactuator to its foremost position. Introduce lockhy engaging the lugs thereon in the lockinggrooves of the receiver. taking care that the ar-rowan the cross-bar of the lock is pointing to-ward muzzle of the g-un with word "up" read-ing- correctlv from rear.

Ag-ain sl;de the actuator with lock all theway to the rear and place the I)olt into pusition.

U,.(/(t /'rt!c/I/II;OIl-' (c) will ('{J, l)//~" .I's.

1. Asscmhlc Triggcl' Mcchallism

First see that magazine caleh is in assemhledposi tiun.

Assemble disconnector to t rigger by depress-ing disconnector spring and sliding disconnec-tor into place.

Place trigg-er, trip, scar and scar lever intotheir respective positions in frame, making surethat forward end of scar lever rests on top ofthe disconnectur. To align these parts pressdownward with end of left thumb on triggerand with hase of thumb on sear. Insert thepivot plate and to avoid binding apply gentlepressure with ball of right hand over entire pivotplate.

2. Assemhlc Safety, Roeker alld Rockcl'Pivot

Insert safety from lcit side of the frame.'With the actuator ill the right hand, steadying-same carefully to avoid excessive movement,

J'allt' furtv.twu l'ag.- for/y./"ra

T II 0 1\1I' SON-----

SUB 1\[ A C J-r , N E (; U N T 11 0 1\["

SON S U II ~I A (. I [ I N E (;UN

7. Assclllulc Rccoil Spring, Buffcr andPilot

Slide bolt forward and rest muzzle of harrelOil table or knee, grasp receiver with left halldal~d with right hand introduce recoil springwIth h~lffer and huffer pilot. J'ush recoil springdown IIIto bolt and let buller pilot lind its seat111receiver and snap into place.

8. Mount Rceciycr on FramcCrasp the frame with right hand in uorlllal

position, making sure that the safetv is set at"lire" and the rocker pivot at "automatic" or"iull-auto." Slide frame on to receiver and atsame time pull the trigger. The frame latch willlock the frame in !Josition and the O"un is now. bready for actIon.

9. Attaching MagazincSee ['recl/llt;o/l (g), IJ/lg" 45.

The hox magazine is attached by engagingthe do\'etail thereon with the dovetail groove inthe forward end of the frame and moving maga-zine upward until caught by the magazrnecatch.

Drum magazines are introduced and removedfrom left side of the gUll. They are held in placehy the magazine catch. If/hell relliuvill[j ur a/-/achill!l a dr/IIII lIIa[ja:;ille be sltre Ihal Ihe bolt isretracted.

Prccautions on DisllIounting and

Assclllbling

(a) See that bolt is forward and rockerpivot set at "autumatic" or "full-auto" heforeattempting to dismuunt frame frum receiver.Rocker pivut must also he set at "autolllatic"or "full-auto" and safety at "lire" whell asselllhling frame to receiver.

(b) Do lIut relllU7!e pivut pIalI' 1I1IIil fralllcItas first beell rellluved frulII rccI' i7liT. If thisprecautiun is disregarded serious difficultiesmay be en tai led.

(c) \Vhen assemhlillg or removing ex-tractor to or from bult. do nut lift extracturhigher than necessary for lug to clear anchor-age hole, to prevent settillg or breaking ufextractor.

(d) \Vhen assembling or removing ejectorfrom receiver, make sure that bolt is not inclused position, as the ejector head engageswith the ejector slot in front end of bolt.

Do not lift ejector leaf higher than neces-sary for disengaging stud with depression inreceiver, to avoid setting or breaking of leaf.

(e) \\Then assembling or removing safetyand rocker pi vat, do not depress fingers Oilpivot plate more than necessary, to preventsetting or breaking.

(f) Do not remove breech oi ler unlessnecessary.

(g) po nut remm e magazine catch unlessnecessary. (The magazine catch can beassembled ur removed unly with the pivotplate partially withdrawn.)

"aye for'Y"/OUT I'IIIIC forty.five

--- -THO ~I l' SON S U 11~l 1\ C II I N I': GU~

Part VIDIRECTiONS FOR CARE AND

PRESERV ATIONKeep the gun well cleaned and oiled.It is important that the gun be thoroughly

cleaned after each day's firing regardless ofthe nunlher IIf shilts fired. Nllt only shouldthe hore and chamher IIf the harrel be cleaned,but alsll all parts and all surfaces of the re-ceiver, bolt, ejector and extractor that arc cun-taded with the powder gases.

Fill' this purpllse the frame should be re-l11m'ed frllm the receiver and the bolt shouldhe taken out tll thoroughly clean the fruntend therelli and the extractor. It may alsohe desirable to remove the extractor. Thebolt-well and the throat of the receiver, as wellas the ejector head, are readily accessible.

Tu pre\'ent rusting as a result of the im-preg"nation uf powder gases a saturated solu-tion of sal soda water. consisting of one-quarter puund of sal soda per pint of water,can he used. Cloth patches soaked in thesal soda solution should be thrust through thehure with the cleaning rod, and the receiverand hlllt surfaces affected should be wipedwith a cloth saturated in the socia solution.Thereafter. all parts shoulcl be thoroughlyclried and well oiled.

Instead ui the suda sulution iur 'cleaningpl1rpllSl'S. .{!(l.wlil/,. has hee11 iound to g-i\'e goodresults.

J'a!ll~ !urty-si.r

THO ~l I' SON SUB ~I 1\ C II I ~ E (;LJ~---

In both cases, 11<J\\:ever, whether soda orgasoli.ne is used, it is important that the partsbe wIped dry after the wash and thoroug-hlyoiled.

.

\\'ith the exception of the mag-azines, it isnot necessary to give the remaining parts ofthe gun a thorough cleaning aiter each tiring.unless many hundred shots have been fired andit is desired to remove all powder residue orother aecumu]ated dirt. The magazines shouldbe treat~d and kept clcan similar to the gunparts aft ected hy powder g"ases. (ll/d I~../'l 7(,,'/1oiled il/sidr. - ,

The cI~'aning r~)(l accompanying the gun shouldbe used In cleanlllg the harrel. The tip of thiscleaning rod is of such diameter that it will ac-commodate one or two patches oi flannel twoinches square. Brass wire brushes, which screwdirectly un to the cleaning rod. an' also furnishedfor cleaning.

Luh..icalioll of Gun

A~lY ~ood grade of light oil may he used for]uhncatll1g the gun.

To lubricate, the frame should he removedfrol11. the re~eiv('r.. Oil should be dropped ovcrthe pivot pOll1ts ot the trig-gel' and trip, and thesear and scar lever; also over the disconnecto!'a!HI rocker,

. Holding the receiver in the leit hand, opens~de up, the bolt should be slight]y retracted and011 should he ~]ropped on the ]ocking lugs oj the]oc~, on the sIdes of the Jock and on all slidingsurtaCl'S of the bolt and !"l'CeIVl'r.

J'l'!,,' !nt'p-.«#'I't'/J

TllOMI'SON SUB 11 A C II I N E GUN

Thc felt pads in thc breech oiler should bckcpt well saturated with oil.

A fter reassembling the frame to the re-ccivcr the bolt should bc rctracted and a littlcoil should be dropped on thc roundcd front endI) f Ihe bolt. Thc actuator knob should bc workedhack and forth scvcral timcs to insurc penetra-t ion of the oil to all parts of the mechanism.

/Ill slidill.rJ surfaces should be oiled frequentlyalld freely to il1sure perfect fltllctiollill.rJ of tht!YUIl.

Keep the chamber cleaned alld oiled. Al-though the Thompson gun is less affected in itsoperation by powder rcsidue than an}" otherknown automatic ann. the careful machine gun-ner will use the brecch-cleallill.rJbristle brush todeall alld oil the chall/ber at rcasonahle intervalsin extcndcd firing. to facilitate thc extraction offired shells and to prcvent pitting and rusting. Itis not nccessary to dismantlc the gun for thispu rposc.

Lllhrieation of Magazines

The box II/aya:::illeshould have its illllIT slid-illY surface ~t'cll oiled to avoid frictioll alld toprevellt rustillg.

The drum magazincs are asscmbled with anabundant supply oi vaselinc in thc spring casehut the hub bearings and thc surfaces formingthe spiral track ill both body ami cover shouldbe kept well oiled to avoid friction and to pre-vcnt rusting.

/'uye forty.eiyht

THO 11 P SON S U 13~1 ,\ CHI N E G U ~

Part VIIDATA

L-Tahle of WeightsPounds

Gnn complctc with sights (without mag-azinc or butt stock) 8.S

Fi,'c box magazincs (clllpty) 2.0Onc Type L drum magazinc (50-cartridge),

empty. . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . .. 2.5One Type C drum magazine (IOO-cartridge),

empty. . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . 3.YOne bnt t stock.. . . . . . . . . . . . . . . . . . . . . . . . . . 1.5One web gnn cas(' I.Y100 Cartridgcs (230-grain bnlkt) 4.62UOUCartridgcs (230-grain IJldlct), packcd. .110.0Triggcr pull. . . . . . . . . . . . . . . . . . . . . . . . . . . .8 to 10

2.-Tahle of DimcnsiollsInches

O,'erall length of gun withont stock 23.2O,'erall length of gun with stock . . . . .. 31.8Overall I('ngth of barrel.. . . . . . . . . . . . . . . . .. 10.5Leagth of bore 9.76Rifling, right hand onc turn in 16 inchcs.H ('cl of but t stol"k below top of receiver. .. 3.3Hcel of butt stock beyond rear uf rccei,'cr.. S.b

:1.-.Magazi lies

Typc XX box ~Iagazin(' (20-cartridge)1.0 bv 1.7 bv 6.2 inch.

Type I: Drnni 11agazinc (50-cartridge)Outside diameter .6.65 inchThickncss of body.. . . . . . . . . . . . . . . 1.40 inchOverall thickness .2.17 inch

Type C DrulII 1fagazinc (IOO-Cartridge)Outside diameter .8.63 inchThickness of body.. . . . . .. . . .. .. . . 1040 inchOverall thickncss , .2.17 inch

Page fortv'uill~

THOMPSON SUBMACHINE GUN

it-Sight

Height of front sight abo\'e axis of bore..I.O.J inchSight radius , 22.30 inchesBattle sight range 50yards

5.-Cartridges

Length of IndIct:230-Grain bullet..............200-Grain bullet...,..........

Length of case.., . .O\'erall length of cartridge:

230-Grain bullet"

1.265 inchZOO-Grain bullet,.., ,. 1.258 inch

Diameter of bullet (cylindrical por-tion) .450 inch

Diameter of cartridge. , . . . . . , . . . . . .472 inch\V eight of bullet 200 and 230 grains\\' eigh t of powder charge.. , . . . . . . 5 grains\Veight of cartridge case and primer 89 grains\Veight of cartridge:

230-Grain bullet 324 grains200-Grain bullet. . . . . . . . . . . . . . . 294 grains

.662 inch

.582 inch

.895 inch

J,. 1llIUIlnuwmmf\l1f11 'Wlllll.Wm"mnnnmmmJI'

L

"

0

Jt..:..~;.",.,...",

SPARE PARTS FOR U. S. NAYY l\IODEL 1928

3. TOI)-}{ecoil Spring.2. Center-Bnffer Disc and Duffer.1. Dottom-Actuator (weighted).

l'a(l~ /if/II

THOMPSON SUBMACHINE GUN

Part VIII

THOMPSON SUBMACHINE GUN~IODEL OF 1928

The outstanding characteristic of Model 1928Submachinc Gun, our U. S. Nayy Model, is itsslowed-down action. \Vhen uscd full auto-matic, r.lodel 1928 fires at the ratc of ahout 600shots pCI' minute, while the cyclic rate furModel 1921 is about 800 shots per minute.

Modcl 1928 Suhmachine Gun can be fired fullautomatic or semi-automatic. Thc principlcsof design are identical and the general instruc-tions for Modcl 1921 apply equally to theModel 1928, except as noted. The slower ac-tion is accomplished by using a weighted ac-tuator (l) ; the recoil spring (28) is of smallerdiameter and inserted into a hole in actuator;the one-piece buffcr (5) is complete with pilotand of smaller diameter and uses a fibre wash-er; the firing pin spring (12) is slightly shorter.

Ammunition and Ballistics: Model 1928 Sub-machine Gun is made for the .45 Salt Auto-matic Ammunition, and uses the regular ballcartridges (230 grain bullet cartridges only)also the shot cartridges and blank cartridges.as used in l\Iodel 1921. The instructions forsighting and the ballistic figures given forModel 1921 apply equally to the :l\1odel 1928.

Magazines: l\Iodel 1928 uses both 20-shotbox magazines and 50-shot drum magazines.However, the Type XX (20 cartridge) boxmagazines are not identical for Model 1921 and

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T I-I 0 ~r P SON SUB ~r 1\ C II I NEe U N---- ----

.\I..del 1928. alld nllly those Type T. (50 cart-ridge) drulll l11agazilles which are marked"Wind to 9 clicks" should be used with Model1928 guns. '\Theil ordering magazines, be sureto speciiy modcl ior which wanted.

Parts: "Vhen ordering parts. use the samenames oi parts as in l\Iodel 1921 as the partsare similar wth the following cxceptions: Ac-tuator (I); Buffer complete (5) with pilot andiibre disc; Recoil Spring (28) and Firing PinSpring (12). State model number and type ofioregrip and give gun serial number when or-dering.

Illustra tion on page 52 shows l\f odel 192RThompsoll Suhmachine Gun with horizontalioregrip. whcn equippcd wi/It a Culls Compcnsa-tor, and 50-shot drum magazine.

This shows how conveniently swivels andsling strap can he fitted to a gun with horizon-tal iorcgrip.

PallOfI/II/.III,..

THOMPSON SUBMACIIINE CUr-:.......

CUTTS COMPENSATOR.

The Cutts Compensator on the Thompson gunIS (see cut a~ove) so constructed that the powder

gases on coml!lg to the muzzle are coned to higher

pressures whIch are thrown out the orifices in

the compensator in upward direction, pressing

the muzzle downward, thus decreasillg the telld-CIlCY of mll:::zle rising ill alltomatic firillg. Thecompensator has a tendencv also to reduce recoil

lit semi-automatic firillg: the Cutts Compensa~tor. stabilizes the carbine and submachine gun, en-abling greater accurac}' of rapid firing.

To get full stabilizing effect of the Cutts Com-pen~ator, the gun must not be held too tightlyagamst the shoulder.

Caution: To get the [ull effect of the com-pensator. it is recommended that the holes ororifices in its top be inspected to see that the\'are always open and not clogged with dirt,

sand or clay.

SPARE PARTS FORCARBINE MODEL 1927(Reading left to right).

Top-Rocker, Rocker Plun-ger, Rocker Plunger,Spring and Rocker Pin.

Bottom-Rocker Pivot (al-tered) .

--.

t ~II

- .J1'ay, fifl]l-fal/r

THO :.[ P SON SUB:.1:\ C II 1 ~ E G U ~

nIL Part IX

THOMPSONSEMI-AUTOMATIC CARBINE

MODEL OF 1927(abu ,'all,.d .Mudel No. 27AC when ,',(uipped with

CUtiS Compensator)

The Thompson Semi-Automatic Carbine, Modelo[ 1927. has the same automaticreloadingprin-ciple as the Thompson Submachine Gun, but fires0111)'aile shot for each separate pull of the trigger.

Each shot is under full contra] by the operator,yet the fast reloading action permits firing up to]00 single aimed shots in one minute, when re-qui red.

Construction: The l\lodcl 1927 Carbine is inappearance similar to the submachine gun.\Vhile the weight of the submachine gun andcarbine are about the same. and they have thesame barrel and same over-all length and thesame set of sights. there are differences in con-struction and adjustment so that it is not prac-ticable to COllvert the carbille illto a submachille,1/1111.The parts which are different in construc-tion are the [rame. sear, sear lever, rocker,rucker plunger. rocker plunger spring. rockerplunger pin and rocker pivot.

Ammunition and Ballistics: l\fodel 1927 Ca r-bine .45 caliber is made for the .45 Colt Auto-matic Ammunition. and uses the regular ballca rtridg-es (230 grain ])lJl]et cartridges only).also using the shot cartridges and blank cart-ridges, as used in Model 1921. The instruc-

Paue fiflJl.five

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THO ),[ P S 0:\ S t. B ),[ .\ C II 1 N E G U K- - - -- ----

tions ior sighting and the hallistic ligures givenior Model 1921 Sl1bmachine Gun apply cquallyto the i\Iodel 1927 Scmi-.\utomatic Carbine.

Magazines: The 1\1odel 1927 Carbinc usesthe same box magazines and drum magazinesas the Model 1921 Submachine Gun.

Parts: When ordcring parts, usc the samenames oi parts as in Model 1921 but bc surc tospeciiy that parts are wanted for the 1927 Car-bine. The rocker plunger, the rocker plungersprillg and the rocker plunger pill are iOtmd inIvloclel 1927 Carbine only. Some Maciel 1927 Car-bincs have vertical forcgrip. others have hori:::OII-tal foregrip. State the Moclel number and typeoi foregrip, ancl always give the carbinc serialIllll11ber.

To take apart or rc-asscmblc. and for clean.ing alld oiling, follow the samc instmctiolls asior I\lodel 1921.

Cutts Compensator is usually ordered on;\!ode1 1927 Carbine as wcll as 011 thc Suhma-chine Guns, as it stabilizcs thc gun when firedrapiclly, ancl reduces the recoil to practicallynothing. Cutts Compellsators can only hefitted to Thompson Carhincs and SuhmachillcCllns at thc factory.

Palle fiflv.'""'''

THO !It P S 0 f\ SUB ~1 A CHI N E GUNTHO !II l' S 0:\ S LT II ~[ i\ C II [ N E l; U N

Parl XCARRYING EQUIPMENT AND

ACCESSORIES(A) Carrying equipmcnt consists oi \Veh Gun

Carrier Case ior Model 21A and 211\C Suhma-chine Cuns including Model 27 A and 27 AC whenequipped with vcrtical foregrip. \\Then orderinggl~n c;~ses th~ model of gun and whether equipped\\"Ith Cutts Compensator or not as well as whetherfor mounted or demounted use should be statedinclud~ng type of f?regyip on gun (i. e.) verticalor hOrIzonta1. Onlmanly with a horizontal fore-~rip guns arc equipped with gun slings for carn'-II1g and gun cases are not essentia1. The vVch1;1111Carrier Case contains a pocket for carrying

detachahle stuck and a four cell pocket for carry-ing four twenty capacity type XX hox maga-zines. A fifth type XX magazine is carried at-tached to gun in case. There is also provided a\Veb Delt on which a four cell pocket web caseior Type XX il'fagazines and a \Veb Case forType L fifty capacity drum magazine can bc at-tached, The \Veb Case W"JrType L drum mag-azine can he ordered with a shoulder strap forcarrying if so desired instead oi being carried onhelt.

TYPE A

GUll Carrier Case slwlVillgllOls/,'r for stock alld four[locke/s for 20-ca[laci/)'

box magazilles.

W'eb GUll Carri,'r Case for II1mll/t,.d Use.

""!!t' fil'y-,.ivhl

Pave fllty.ni11'-

T II 0 ~I P SON S lJ II ~I A C II I N E (;U~

Fifly rO/llul tlr/WIma~azille case wilh

sholl/tler slrap.

TYPE D

Four'pO"!."'1 ca,,,' lor 20:rOlflld box ml/gl/zill"" a",{case lor SO.rOlIlU{ drum magl/zille aI/ached 10

11;,,1, bell.

l'avc lii.fly

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