Parts and Kits Web Store - Suomi KP31 & Swed 37 SMG - Suomi Project Gun Parts

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sku: MS-241125-03

Lot: MS-03: 8 Suomi Mags, 4 Sten mags Pouch

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Now: $225.00

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sku: U-SL-Trun

Stemple Trunion Assembly - Slide Lock Pattern

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Now: $390.00

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sku: 9mmSMGGauge

9mm SMG Chamber and Headspace Gauge

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Now: $36.00

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sku: stg9mmdrops4.25

9mm Barrel Blank 4.25" long

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Was: $14.00

Now: $9.00

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sku: 3110-shroudshim.01

KP31 Shroud Shim - .01" thick

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Now: $4.85

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sku: 3110-16-SA

KP31 Suomi SEMI AUTO HEADSPACE pattern 9mm Barrel 16" Threaded 1/2-28

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Now: $135.00

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sku: 191204-01

Torch Cut KP31 Suomi Receiver

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Now: $30.00

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sku: 3110-shshim-.002

KP31 Shroud Shim - .002" thick

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Now: $4.85

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sku: 3110-a-.001

KP31 Barrel Shim - .001 thick

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Now: $2.75

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sku: 3110-shroudshim.005

KP31 Shroud Shim - .005" thick

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Now: $4.85

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sku: 3110-12.75

Stemple STG 9mm Barrel 12.75"

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Now: $160.00

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sku: U-Trun-Pin

Stemple Trunion Retaining Pins

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Now: $12.50

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sku: STG 76, 76W, 34k Threaded Trun

Stemple STG U-9mm, 76, 76W, 34k Trunion (Old Locknut Type)

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Now: $200.00

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sku: STG-U Buffer Rod

STG-U-34k/76/76W Buffer Rod

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Now: $12.00

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sku: 34kMH

STG34k Magazine Housing

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Now: $350.00

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sku: U-Lug-Trun-2-Pin

Stemple Trunion U9, 76, Stemple Suomi & 34k - 2 Pin Pattern

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Now: $350.00

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sku: U-9mm, 76, 76W, 34k-ej

Ejector U9, 76, Stemple Suomi, & 34k

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Now: $12.00

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sku: 42209-H

Semi Auto Trigger Adapter (Housing Only)

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Now: $32.50

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sku: 011111-12

Project Gun Pin

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Now: $1.00

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sku: 011111-11

Suomi Rear Cap Mount with Buffer

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Now: $12.00

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sku: 3110-a

KP31 Barrel Shim - .003 thick

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Now: $2.75

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sku: 3137

Suomi KP31 / Swed M37 Screws: Stock and Trigger

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Now: $19.95

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sku: AR-FG-BRP

AR Handguard Foregrip

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Now: $4.50

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sku: MS-241125-03

Lot: MS-03: 8 Suomi Mags, 4 Sten mags Pouch

Original Items Actual items Pictured Condition as shown Includes: 8x Suomi mags of various types (some have some crusty spots at top from corrosive ammo --- see closeup pics) 4 x Sten mags 2 have Bg...

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Now: $225.00
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sku: U-SL-Trun

Stemple Trunion Assembly - Slide Lock Pattern

Standard replacement Trunion Assembly for Stemple STG Standard Bolt Setups without pin mounts: Includes trunion, ejector, locking piece, locking pin, and spacer. Compatible with U9, 76, Stemple Suomi & 34k Stemple 76/45 setups without trunion mount...

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Now: $390.00
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sku: 9mmSMGGauge

9mm SMG Chamber and Headspace Gauge

9mm SMG Chamber Wear and Headspace Gauge To ensure the safe operation of 9mm Fixed-Firing-Pin (FFP) Blow-Back (BB) Submachine Guns (SMGs), chamber wear and headspace should be verified. Since SMGs don't typically show a lot of bore wear...

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Now: $36.00
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sku: stg9mmdrops4.25

9mm Barrel Blank 4.25" long

9mm 1:10 Twist 41v50 Chrome Moly unused not chambered These are drops from barrels for the Stemple Suomi we cut down 4.25" long The diameters are marked in the pictures.

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Was: $14.00

Now: $9.00
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sku: 3110-shroudshim.01

KP31 Shroud Shim - .01" thick

Copied from original parts and made from stainless steel. Thickness .01" This part tightens the barrel jacket to receiver fit by 'shimming' the rear of the barrel shroud to receiver/trunion. This is a very useful part for...

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Now: $4.85
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sku: 3110-16-SA

KP31 Suomi SEMI AUTO HEADSPACE pattern 9mm Barrel 16" Threaded 1/2-28

16" barrel for Semi Auto KP31. Works with slant pattern KP31 shroud. Will work with compensated shroud if the exit hole is opened to .635". HEADSPACE on Closed Bolt Semi Auto Guns vs Open Bolt / Fixed Firing Pin Blow Back...

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Now: $135.00
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sku: 191204-01

Torch Cut KP31 Suomi Receiver

Original Finnish KP31 Torch Cut Receiver The cuts are severe as pictured.

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Now: $30.00
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sku: 3110-shshim-.002

KP31 Shroud Shim - .002" thick

Copied from original parts and made from stainless steel. Thickness .002" This part tightens the barrel jacket to receiver fit by 'shimming' the rear of the barrel shroud to receiver/trunion. This is a very useful part for...

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Now: $4.85
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sku: 3110-a-.001

KP31 Barrel Shim - .001 thick

Copied from original parts and made from stainless steel. Thickness .001" These are the most thin we could make. They are excellent for fine tuning your barrel to trunion to shroud fit. This part tightens the barrel...

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Now: $2.75
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sku: 3110-shroudshim.005

KP31 Shroud Shim - .005" thick

Copied from original parts and made from stainless steel. Thickness .005" This part tightens the barrel jacket to receiver fit by 'shimming' the rear of the barrel shroud to receiver/trunion. This is a very useful part for...

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Now: $4.85
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sku: 3110-12.75

Stemple STG 9mm Barrel 12.75"

12.75" barrel for BRP Stemple Takedown Guns. FULL AUTO CHAMBER SPEC. Extractor Location The extractor relief on this barrel is setup for the BRP-Stemple extractors and would have to be enlarged to accommodate the KP31 extractor for...

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Now: $160.00
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sku: U-Trun-Pin

Stemple Trunion Retaining Pins

Standard set of replacement Trunion Retaining Pins. (2 pins included)

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Now: $12.50
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sku: STG 76, 76W, 34k Threaded Trun

Stemple STG U-9mm, 76, 76W, 34k Trunion (Old Locknut Type)

2006-2010 Threaded Type Trunion. Standard replacement Trunion Assembly for Stemple STG pattern trunions: STG U-9mm, STG 76, STG 76W, & STG 34k Includes ejector, lock nut, and retaining pins.

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Now: $200.00
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sku: STG-U Buffer Rod

STG-U-34k/76/76W Buffer Rod

STG Buffer Rod for STG34k, 76, 76W to be used with standard Suomi mainsprings

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Now: $12.00
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sku: 34kMH

STG34k Magazine Housing

2011 Pattern STG34k Magazine Housing (complete with magazine latch and barrel latch) The rear is also designed to fit the stocket of a Finish KP31 stock.

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Now: $350.00
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sku: U-Lug-Trun-2-Pin

Stemple Trunion U9, 76, Stemple Suomi & 34k - 2 Pin Pattern

Standard replacement Trunion Assembly for Stemple STG Standard Bolt Setups with pin mounts: Includes ejector and retaining pins.

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Now: $350.00
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sku: U-9mm, 76, 76W, 34k-ej

Ejector U9, 76, Stemple Suomi, & 34k

Standard replacement ejector for Stemple STG pattern trunions: STG U-9mm, STG 76, STG 76W, & STG 34k Includes ejector blade and retaining pin.

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Now: $12.00
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sku: 42209-H

Semi Auto Trigger Adapter (Housing Only)

Semi Auto Trigger Adapter: (HOUSING ONLY) Does NOT include: AR Parts The front of the original MG42 trigger pack must be machined (see prints), then this part is welded to the front of the original trigger pack. It is very important to...

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Now: $32.50
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sku: 011111-12

Project Gun Pin

1/4 diameter x 1 1/4 long blued clevis pins These are very useful for joining parts for project guns.

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Now: $1.00
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sku: 011111-11

Suomi Rear Cap Mount with Buffer

Assembly for mountain a Suomi buffer with having to thread the the rear of your receiver. This is the setup we used to mount the buffer in our early STG34k guns. This assembly includes: - 1 M31 buffer - 1 BRP rear tab: this part...

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Now: $12.00
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sku: 3110-a

KP31 Barrel Shim - .003 thick

Copied from original parts and made from stainless steel. Thickness .003" This part tightens the barrel to jacket fit by 'shimming' the rear collar of the barrel. This is a very useful part for accurizing you gun or just fixing...

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Now: $2.75
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sku: 3137

Suomi KP31 / Swed M37 Screws: Stock and Trigger

Includes the trigger screw and trigger screw keeper, and stock/tang screw

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Now: $19.95
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sku: AR-FG-BRP

AR Handguard Foregrip

AR Handguard Foregrip: Simply uses screws and nuts to attach to standard A2 and M4 handguards (mounting parts included). Also fits 2008-2010 pattern shrouds for STG34k and STG76

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Now: $4.50
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Suomi Project Gun Parts