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Suomi Project Gun Parts

  • 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...

    $390.00
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  •  Semi Auto Trigger Adapter (Housing Only)

    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...

    $25.00
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  • KP31 Barrel Shim - .001 thick

    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...

    $2.75
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  • KP31 Barrel Shim - .003 thick

    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...

    $2.75
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  • KP31 Parts Kit with Drum and Barrel 09220-02

    KP31 Parts Kit with Drum and Barrel 09220-02

    KP 31 kit with cut receiver   Original items. Actual items pictured.   Rear stock tang is cut and missing Good condition drum with external wear but inspected for proper function Dents on shroud Barrel has external wear but lands and...

    $190.00
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  • KP31 Shroud Shim - .002" thick

    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...

    $4.85
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  • KP31 Shroud Shim - .005" thick

    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...

    $4.85
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  • modification print

    Semi Auto Trigger Adapter with AR Parts

    Semi Auto Trigger Adapter: with AR hammer, disconnector, and trigger assembly with standard pins   The front of the trigger pack must be machined (see prints), then this part is welded to the front of the original trigger pack. It is very...

    $75.00
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  • Stemple STG 9mm Barrel 12.75"

    Stemple STG 9mm Barrel 12.75"

    12.75" barrel for BRP Stemple Takedown Guns.  These can be adapted for use with Finnish KP31 and semi auto variants.   Works with slant pattern KP31 shroud.  Will work with compensated shroud if the exit hole is opened to .635"...

    $120.00
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  • Stemple STG 9mm Barrel 16" Threaded 1/2-28

    Stemple STG 9mm Barrel 16" Threaded 1/2-28

    16" barrel for BRP Stemple Takedown Guns.  These can be adapted for use with Finnish KP31 and semi auto variants.   Works with slant pattern KP31 shroud.  Will work with compensated shroud if the exit hole is opened to .635"...

    $120.00
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  • STG34k Magazine Housing

    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.  

    $350.00
  • Suomi Rear Cap Mount with Buffer

    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...

    $8.50
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  • AR Handguard Foregrip

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

    $4.50
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