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Finnish KP31 Individual Parts

  • 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 Barrel
    $85.00 M31 Barrel
    Original Barrel in Excellent Condition  

  • M31 Bolt (full auto - original)
    $42.00 M31 Bolt (full auto - original)
    complete with extractor

  • M31 Charging Handle
    $8.00 M31 Charging Handle
    Original M31 Charging Assembly: includes; handle, spring, bolt catch, and pin

  • M31 Rear Cap
    $5.00 M31 Rear Cap
    Original Rear Cap in Excellent Condition

  • M31 Rear Sight
    $12.00 M31 Rear Sight
    Original Suomi - Tikka mfg 500m tangent

  • M31/37 Barrel Jacket Latch
    $6.50 M31/37 Barrel Jacket Latch
    Removed from original receiver

  • M31/37 Mainspring
    $10.00 M31/37 Mainspring
    Original Mainspring

  • Mainspring STG U9, 34k, & Suomi - New Production
    $10.00 Mainspring STG U9, 34k, & Suomi - New Production
    New Production Mainspring for Suomi KP31, Swed M37, STG 76, Stemple Suomi, STG U9, STG 34k

  • STG Universal Barrel Shroud - M31 Compensated Front (LONG PICATINNY RAIL)
    $140.00 STG Universal Barrel Shroud - M31 Compensated Front (LONG PICATINNY RAIL)
    M31 Slant Barrel Shroud with new parkerize finish for use with 13" barrels For STG 43, 34k 2011 ptrn, 76 2011 ptrn, & U ptrn 9" rail mount on bottom of shroud

  • STG Universal Barrel Shroud - M31 Slant Front (LONG PICATINNY RAIL)
    $140.00 STG Universal Barrel Shroud - M31 Slant Front (LONG PICATINNY RAIL)
    M31 Slant Barrel Shroud with new parkerize finish for use with 13" barrels For STG 43, 34k 2011 ptrn, 76 2011 ptrn, & U ptrn 9" rail mount on bottom of shroud

  • Suomi Drum Tool
    $4.50 Suomi Drum Tool
    Fitted tool for the Suomi Drum Feeder Arm for 1/4" hex drive tool.   It allows you to remove the arm for retensioning the drum.

  • 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 KP31 / Swed M37 Screws: Stock and Trigger
    $14.50 Suomi KP31 / Swed M37 Screws: Stock and Trigger
    Includes the trigger screw and trigger screw keeper, and stock/tang screw

  • Suomi Magazine
    $25.00 Suomi Magazine
    36rd original Finnish Suomi drum. Works with M31/KP31, M37/39, M45. (not for sale where prohibited) Excellent Condition         MAGAZINE SHIPPING RESTRICTIONS   California...

  • 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...