STG 1928 Spare and Replacement Parts

BRP STG T Shirt by Nine Line - Red

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

Finned STG1928 10.35" Barrel Assembly with Compensator

Complete STG 1928 barrel assembly for post-2012 parts sets.   Includes: Finned Barrel Lock Nut Compensator Front Sight Assembly   45ACP 41V50 Steel Parkerized Finish Threaded 5/8"-24 on end.  The compensator threads on the...

Stainless Steel Mag Follower for Thompson 20 & 30 rd mags (last shot drop)

New made item. This follower is machined form stainless steel There's a ramp machined into the top of the follower and no tab on the follower rear to engage the last-shot-hold-open feature.  After firing the last shot the bolt will travel over the...

BRP STG 1928 and USGI Thompson SMG Picatinny Bipod Adapter

This Picatinny bipod adapter attaches to standard USGI pattern resting bars: BRP STG 1928, original USGI Thompson 1928, M1, M1A1, and any original Thompson pattern forend resting bar. These are for USGI pattern and BRP 1/2" width front grip mounts...

STG 1928 -Resting Bar Assembly

Fit STG 1928 Bolt Guid Assembly Includes: Resting bar Bolt Guide Mounting Screws with Lock Washers Barrel Locknut Set Screw Horizontal Foregrip Mount Screw Vertical Foreign Mount Screw

STG1928 10.35" Barrel Assembly with Compensator

Complete STG 1928 barrel assembly for post-2012 parts sets.   Includes: Barrel Lock Nut Compensator Front Sight Assembly   45ACP 41V50 Steel Parkerized Finish Threaded 5/8"-24 on end.  The compensator threads on the end of...

STG-1928 Head Space Stop Bar

Includes 1 x Headspace Stop Bar with 2 x Mounting Pins This is a replaceable part for the 2021 and later STG 1928 bolt assembly.   

U45 and STG1928 10.35" barrel threaded 5/8"-24

45ACP 10.35" long barrel  41V50 Steel Parkerized Finish Fits U45 and STG1928 setups Threaded 5/8"-24 on end

STG 1928 Hard Case

Custom Hard Case for STG 1928 High-Density CNC Machined Foam

Nylon Thread Protector - For Internally Threaded Pattern (ITP) receivers

Nylon Thread Protector for the new Universal Stemple 76/45 threaded Trunion pattern. The front of the Stemple 76/45 Receiver is internally threaded for the installation of the new Universal pattern threaded trunion usedfor the U9, U9SF, U45,...

STG Vinyl Stickers 2" x 2"

2" x 2" vinyl sticker

Upgrade of Early Pattern To Current STG 1928

The 2006 Patterns by JR Stemple were Not drum-compatible.  By replacing the housing and internal bolt/barrel components we can upgrade these older pattern guns to accept drums as well as the quick-change barrel system.   The gun would...

STG 1928 - Keeper

Keeper for rear of housing

STG 1928 - Rear Takedown Screw

Rear Screw for STG 1928

STG 1928 - Sear Assembly

Sear with spring and spring seat

STG 1928 - Mainspring

Mainspring for STG 1928 and STG M1A1

STG-Barrel Locknut

Barrel Lock Nut

STG-1928 Barrel Assembly 10"

10" barrel with locknut and front sight

STG-1928 Ejector

Ejector with retianing pins

STG-1928 Charging Handle

Charging handle with retianing pin

STG-1928 Bolt

Bolt Assemlby wiht Extractor

STG-1928 Extractor Spring

Extractor spring for STG1928 extractor.     There are 2 types of extractor springs:    Pattern 1 extractor spring for  pre-2020 bolts:  These bolts are dull silver or dark parkerized in color   Pattern 2...

STG 1928 Extractor with Spring and Pin 2010-2020 pattern

Standard AR- M16 Extractor with small flat machined to for STG 1928    2010-2020 pattern: This has a .017 step in the extractor for the parkerized & dull silver STG1928 bolts.   See Reverence Picture. The new shinny Nickel Boron...

578" - 28 thread protector

Stainless Steel Thread Protector & Flash Hider for 578" - 28 Threaded U9 and U45 Barrels.    Features wrench flats for easy removal.

STG-1928 Buffer Rod

Stainless Steel Buffer Rod for STG M1A1 & 1928

STG-1928 Buffer

Polyurethane buffer for STG M1A1 & 1928

Magazine Enhancer for 1928 Pattern Subguns

Spacer for 1928 pattern magazine well for use with 20 and 30 round Thompson magazines. The drums used in the 1928 pattern Thompson are wider than the standard 20 and 30 round magazines.  The resulting gap between the front of the magazine and feed...

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 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...

Picatinny Rail Adapter For Thompson SMG & BRP STG M1A1/1928

Takes place of original USGI rear sight on our housings (Threaded 8-32). No modifications required for the STG1928.   If you have a semi auto Thompson with 8-32 threaded mount holes this will fit without modifications as...

STG-1928: 3" Barrel Conversion Kit with Vertical Grip for Suppressor

STG 1928 3" Barrel Conversion   This setup is great for use with a suppressor to reduce the cycle rate and keep the overall length down.  Given the relatively low bolt mass for this setup, adding a suppressor increases blowback energy...

STG-1928: 3" Barrel Conversion Kit

STG 1928 3" Barrel Conversion   This setup is great for use with a suppressor to reduce the cycle rate and keep the overall length down.  Given the relatively low bolt mass for this setup, adding a suppressor increases blowback energy...

STG-1928: 3" Barrel

Includes: Barrel 45ACP Length: 3" 41V50 Steel  Parkerized Finish Threaded 5/8"-24 on end   3" Barrel Setup Info This setup is great for use with a suppressor to reduce the cycle rate and keep the overall length down...

Offset Resting Bar for STG-1928 3" Barrel Setup

The offset resting bar is necessary so the foregirp can clear the outside diameter of a large SMG suppresser when using the short barrel setup.  We typically use Atlantic Coast Machine MIMS and Bowers Vers45 suppressors with these SMGs...

Mainspring for STG-1928: 3" Barrel Conversion

Includes: Reduced Power Mainspring   3" Barrel Setup Info This setup is great for use with a suppressor to reduce the cycle rate and keep the overall length down.  Given the relatively low bolt mass for this setup, adding a...