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The

STEN

MKIIComplete machine plans

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Sten Mk II

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Barrel hushing

Material: 4140

Scale:

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78

Magazine housing

Material: as nottedScale: 1 : 1

I

- r--r1 2 3 * -y44 !IIII70

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Magazine latch. Material: AISI 1010 or equivalent2.7mm stock. Case harden O.lmm deep

11 4\ 3R t yp . 7 [- 9.5

r6 3I 4.3

+==7.2

Scale: 1 :1

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1

b .

STEN Mk IISPECIFICA-TIONS1. Cartridge: 9mm Parabellum

Bullet weight

Powder weight

Muzzle veiocity116 grains6 grains1400 ft./set.

2. Recoil Spring: W ire diameter 0.067 in,Spring OD 1.00 in.Active coi ls 15

Free length 9.40 in.

Initial length 6.80 in.

Finai length 3.20 in.Work stroke 3.60 in.

3. Bo lt : Weight

(including extractor)

Cocking handle

1.327 ib. (9290 grains)

0.077 lb. (540 grains)

Total recoiling weight: 1.404 lb. (9830 grains)Bolt maximum dia. 1.381 in.

Bolt overall dia. 5.75 in.

Bolt body length 4.21 in.

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Extractor Material: AISI 1040 or equiv., stock 4.7 wideScale: 4.5 :1 harden to: Rc 48-52

W\ 210

/

II-- &5R 1 \

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Trigger housing cover

Material: lmm stock, formedRequired: 1 Scale: 1:1

142

22

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.

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..Trigger housing

Scale: .87 :1

&Iaterial:2.5mm stockRewired: 2

-r42

- -730

-7 -25

- I -

\

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5.5 R ref.3.1 # wire

xote: Trigger pin may be substituted byspring pin 3.1 # by 26 long.

Firing pin

Material: Drill rod

Harden to Rc 50C.WR

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USE

Extractor

Magazine latch

Closing

Trigger

11

1.6

0 7

Selector 0.45

Barrel sleeve latch 1

7 1

8 7

26.5

4.6

4 6

8 7

SPRINGS

12

15.5

24 5

57

14

35

% .Gr.sq -

Extension

spring

loops

Gr.Sq.

SUBSTITUTE:

LC-04oc-4LC-OLZOC-6

LE-026B-7or

LE-026C-8LC-Oi8B-6

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Scale: .87 : 1

Trigger

Material: AISI or equivalent

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SearMaterial: AISI 4140 or equivalent

Harden to Rc 55

L 3.1 $driil rod

Scale: 1 :1

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Top view

i-I_87.

--r

Front view

Rear view

Magazine

Material: lmm steel stock

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Magazine follower

Material: low carbon steel

3.6R

Scale: 1 :1

(ciearance for magazine body)

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w-0 :

4 .

- \ I-II--- -,-_I/ I

VIagazine springMaterial: Music wire 1.5mm dia.

6.5R ref.

Over-all length: 313

Number of .coi ls : 26

r- 27.7 - r 6.5R/Scale: .87 :1

Magazine bottom retainer

P - - - - 3 1 ---I Material : lmm mild steel

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