STG Stemple - Suomi 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...

BRP STG T Shirt by Nine Line

BRP STG T-Shirt by Nine Line  Black Shirt With White Artwork

Slide Lock Trunion: Trunion Body with Ejector

Trunion Body with Ejector for Slide Lock Trunion Assembly   Compatible with Stemple STG Standard Bolt Setups Slide Lock Trunion systems

Slide Lock Trunion: Locking Piece

Locking Piece for Slide Lock Trunion Assembly   Compatible with Stemple STG Standard Bolt Setups Slide Lock Trunion systems

Internally Threaded Pattern (ITP) and Slide Lock Trunion: Locking Pin

Trunion Locking Pin for Slide Lock Trunion Assembly and Internally Treaded Patter (ITP) setups   Compatible with Stemple STG Standard Bolt Setups Slide Lock Trunion systems

Slide Lock Trunion: Spacer - Stainless Steel

Spacer (.030) for Slide Lock Trunion Assembly Stainless Steel   Compatible with Stemple STG Standard Bolt Setups Slide Lock Trunion systems

STG Universal Rear Takedown Pin for Lowers with AR Push Pin

STG Universal Rear Takedown Pin for Lowers with AR Push Pin for post-2020 Universal Fire Control Groups   The Rear Takedown Pin secures the Receiver Assembly to the Lower Housing Assembly via an AR Takedown Push Pin.  A 6-32 set screw retains...

STG Universal Rear Takedown Pin SHIM for Lowers with AR Push Pin

.001 thick Shim for tightening the fit of the STG Universal Rear Takedown Pin to Universal Fire Control Groups with AR Push Pins for post-2020  

Rear Takedown Pin Support Block for Lowers with AR Push Pin

STG Universal Rear Takedown Pin Support Block for Lowers with AR Push Pin in post-2020 Universal Fire Control Groups   The Rear Takedown Pin Support Block and Pin is reversible to accommodate for both types of Stemple 76/45 Receiver rear hole...

S7 - STG Universal Extractor with Spring and Pin

Newly manufactured extractor for all Universal configurations: U9, 34k, Stemple-Suomi, STG 76, U9SF, U45, U762, and post-2020 STG 1928s   Includes extra power Wolfe spring and mounting pin.   Unlike the AR pattern extractors this has a more...

STG Universal Barrel Shroud with Extra Rail (NiB Plated)

STG Universal quad rail barrel shroud for 10", 10.35" and 16" barrels:   The bottom rail in machined into the shroud.  1 accessory is included.  Accessory rails can be attached to the top, left and right of the shroud.  Extra...

1/2" - 28 thread extension 1" long

Steel Thread Extension for 1/2" - 28 Threaded U9, U7.62 & 34k barrel  Features wrench flats for easy removal. (9/16" wrench) OAL: 1.4" Extends threads by 1"

STG Vinyl Stickers 2" x 2"

2" x 2" vinyl sticker

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...

STG Universal Barrel Shroud with Extra Rail (Black Anodized)

STG Universal quad rail barrel shroud for 10", 10.35" and 16" barrels:   The bottom rail in machined into the shroud.  1 accessory is included.  Accessory rails can be attached to the top, left and right of the shroud.  Extra...

Suomi 36 rd stick magazine

36rd original Finnish Suomi drum. Works with M31/KP31, KP44, M37/39, M45. (not for sale where prohibited) Excellent condition       MAGAZINE SHIPPING RESTRICTIONS   California Restrictions: 10 rounds, unless you can...

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...

Picatinny Rail for Shroud

Picatinny Rail for MN shroud and Suomi Shrouds that have been drill and tapped by BRP   3x Mount Screws included

Universal Front Takedown Pin

Standard HK Small Pin used as front takedown pin for the U9, U9SF, U45, U7.62, STG76 and Stemple Suomi

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...

Mainspring STG U9, 34k, & Suomi - New Production

New Production Mainspring for Suomi KP31, Swed M37, STG 76, Stemple Suomi, STG U9, STG 34k

Stemple STG 9mm Barrel 12.875"

12.875" 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"...

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

16" barrel for BRP Stemple Takedown Guns.  Works with slant pattern KP31 shroud.  Will work with compensated shroud if the exit hole is opened to .635".   Extractor Location The extractor relief on this barrel is setup for the...

STG 9mm bolt - 34k & Stemple Suomi ( with NiB One™ plating)

Original STG 34k & Stemple Suomi Bolt Complete with Extractor Assembly.  This bolt is identical to the U9 bolt with the exception of the angle cut for the sear geometry.     NiB One™ plating This is an electroless NIB...

PIAT Cleaning Brush

Original PIAT bristle brush. Approximately 12" long with 1.5" diameter brush.      Also, very useful for cleaning the inside of MG34 & MG42 barrel jackets, and BREN receivers.

STG Universal Barrel Shroud - M31 Compensated Front (LONG PICATINNY RAIL)

M31 Compensated Barrel Shroud with new parkerized finish for use with 12.875" 9mm barrels. Picatinny rail mount on bottom of shroud. Compatible with all Universal pattern Stemple guns and original KP31 SMGs.  *** 16" barrels wil...

STG Universal Barrel Shroud - M31 Slant Front (LONG PICATINNY RAIL)

M31 Slant Barrel Shroud with new parkerize finish for use with 12.875" and 16" 9mm barrels.  The 16" barrels are threaded 1/2-28. Picatinny rail mount on bottom of shroud. Compatible with all Universal pattern Stemple guns and...

Stemple Trunion Retaining Pins

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

Stemple STG U-9mm, 76, 76W, 34k Trunion (Threaded 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.

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

Polyurethane buffer for STG34k, 76, 76W

STG Combo Wrench

Barrel tool with fitted socket for STG Barrel Locknuts, 3/4 wrench for removing the flash-hider, and spanner for suppressor disassembly.

STG Multi-Tool

Type a description for this product here...

Stemple Trunion U9, 76, Stemple Suomi & 34k

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

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.

STG Universal Extractor with Spring and Pin

Standard AR- M16 Extractor with small flat machined to work in all Univerals configurations: U9, 34k, Stemple-Suomi, STG 76, U9SF, U45, U762, and post-2020 STG 1928s   Includes extra power Wolfe spring and mounting pin

STG Universal Charging Handle

STG Charging Handle for: STG Universal STG 76 STG 76W STG 34k STG 43 Stemple Suomi

STG Universal Rear Takedown Screw

STG Universal Rear Takedown Screw for: STG43 STG-U STG76

Picatinny Rail Top for Stemple Receiver

Picatinny Rail Top for Stemple Receiver with mount screws

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...

Stemple Suomi - Pin Set (4 Pins Only)

Replacement Trigger and Sear Pin Set For 2015 or Later Pattern Stemple Suomi Fire Control Group:   Includes 4 Pins: 1 x Trigger-to-Lever Pin 1 x Trigger Pin 1 x Sear-to-Lever Pin 1 x Sear Pin

Stemple Suomi - Trigger Spring Seat

Replacement Trigger Spring Seat For 2015 or Later Pattern Stemple Suomi Fire Control Group

Stemple Suomi - Trigger Spring

Replacement Trigger Spring For 2015 or Later Pattern Stemple Suomi Fire Control Group

Stemple Suomi - Trigger

Replacement Trigger For 2015 or Later Pattern Stemple Suomi Fire Control Group

Stemple Suomi - Trigger-to-Sear TRANSFER LEVER

Replacement Trigger-to-Sear Transfer Lever For 2015 or Later Pattern Stemple Suomi Fire Control Group

Stemple Suomi - Sear

Replacement Sear For 2015 or Later Pattern or Later Stemple Suomi Fire Control Group