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Suomi Project Gun Parts

  •  Semi Auto Trigger Adapter (Housing Only)
    $25.00 Semi Auto Trigger Adapter (Housing Only)
    Semi Auto Trigger Adapter: (HOUSING ONLY)   Does NOT include: AR Parts

  • Ejector U9, 76, Stemple Suomi, & 34k
    $12.00 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.

  • KP31 Barrel Shim - .001 thick
    $2.75 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...

  • KP31 Barrel Shim - .003 thick
    $2.75 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...

  • KP31 Shroud Shim
    $4.85 KP31 Shroud Shim
    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...

  • M31 Rear Sight - machined
    $12.00 M31 Rear Sight - machined
    Original Suomi KP31 rear sight machined to fit the radius of the a 1.375ø receiver tube.  These are the sights we use on the STG76w (Stemple-Suomi) machinegun.

  • Project Gun Pin
    $0.80 Project Gun Pin
    1/4 diameter x 1 1/4 long blued clevis pins   These are very useful for joining parts for project guns...

  • Semi Auto Trigger Adapter with AR Parts
    $65.00 Semi Auto Trigger Adapter with AR Parts
    Semi Auto Trigger Adapter: with AR hammer, disconnector, and trigger assembly with standard pins

  • Standard Bolt Trunion U9, 76, Stemple Suomi & 34k
    $200.00 Standard Bolt Trunion U9, 76, Stemple Suomi & 34k
    Standard replacement Trunion Assembly for Stemple STG Standard Bolt Setups: Includes ejector and retaining pins.

  • STG-76W Sear (old pattern)
    $5.00 STG-76W Sear (old pattern)
        First pattern STG-76W sear for select-fire guns.  Made from 4140. Fitting and hardening may be required...

  • STG-U-34k/76/76W Buffer Rod
    $12.00 STG-U-34k/76/76W Buffer Rod
    STG Buffer Rod for STG34k, 76, 76W to be used with standard Suomi mainsprings

  • STG34k Magazine Housing
    $260.00 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.  

  • Suomi KP31 - Stemple STG 9mm Barrel 12.75"
    $120.00 Suomi KP31 - Stemple STG 9mm Barrel 12.75"
    12.75" barrel copatible with BRP Stemple Takedown Guns and Finnish KP31.   Designed to work with original KP31 Suomi M31 barrel shrouds. US Made 4140 Alloy Steel Parkerized Metal Finish Twist Rate: 1:10 Muzzle...

  • Suomi KP31 - Stemple STG 9mm Barrel 16"
    $120.00 Suomi KP31 - Stemple STG 9mm Barrel 16"
    16" barrel Copatible with BRP Stemple Takedown Guns and Finnish KP31.   Works with slant pattern KP31 shroud.  Will work with compensated shroud if the exit hole is opened to .635". Case exposed on rear: .12" - ...

  • Suomi Rear Cap Mount with Buffer
    $8.50 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...

  • Trunion Retaining Pins
    $7.50 Choose Options Trunion Retaining Pins
    Standard set of replacement Trunion Retaining Pins.  (2 pins included)

  • AR Handguard Foregrip
    $4.50 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