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Stemple 76/45: STG M1A1/1928 Setup: $11.7k






In 2003, the original inventor, John Stemple collaborated with BRP Corp to make new and replacement parts for the Stemple 76/45 receivers he manufactured prior to the 1986 cutoff.  From this came a series of compatible drop-on parts for the unmodified/transferable Stemple 76/45 receivers known as Stemple Takedown Gun (STG) setups.  Since nothing is welded or hand fitted to these receivers, changing setups and replacing parts is fast and easy.  These are the most finely built and smooth running sub-machine guns on the transferable market.  We build them for performance and durability, stock plenty of high-quality spare parts, and provide excellent service.  There is only a limited number of these pre-1986 registered/transferable machine guns remaining, so get one while they last.

The Stemple STG M1A1/1928 is assembled from an original Stemple 76/45 machine gun receiver, newly made Stemple-compatible parts, and several original Thompson components.  The Stemple 76/45 machine gun receiver inserts into a long receiver shroud.  This holds the receiver in position with lower assembly and aligns the sear opening in the Stemple receiver with the new sear in the original Thompson fire control group.  The bolt guide, bolt, barrel, mainspring, buffer, and guide rod assembly is a removable unit inserted through the front of the Stemple receiver.  These main wear parts are easily repaired or replaced if necessary.  

The overall appearance of the STG M1A1/1928 is like that of an original M1A1, with the exception that the rectangular adapter housing for the Stemple 76/45 receiver tube is 3/16 in. taller and 3/4 in. longer than the original M1A1. 


Simple / Durable Design:

Our guns are very difficult to break and very easy to fix. They are simple blow-back guns and very smooth-running in long full-auto bursts.

Easy-to-Replace Parts:

There’s nothing on these guns that cant be easily replaced. We designed this system to protect the registered receiver from any wear during use. The only parts that can wear can be easily replaced without the need to ship the gun back-and-forth.

Available Service:

If you need service, we are here to support our products.

Shoot Cheap Ammo:

We typically just shoot steel-cased ammo. Our milled steel bolt guides easily deal with potential wear issues from any type of ammo.


Includes: 1 x 50 rd drum, 1 x 20rd mag, multi tool, wrench, vertical or horizontal foregrip, both picatinny rear sight & standard "L" sight, both barrels 10" M1A1 pattern barrel & 8" threaded barrel .578x28, and custom hard case


45 ACP Suppressor: $425


STG M1A1/1928 Data

Caliber: .45 acp

Barrel Length: 10.5 in. M1 Pattern Barrel and 8 in. Threaded Barrel (.578-28)

Magazine: Unmodified USGI M1A1/1928 Mags and Drums

Rear Sight: Original M1A1 or "L" for 1928, and Picatinny Rail included

Forend: vertical (reproduction) or horizontal (original)

Cycle Rate: 750 rpm (Full-Auto/Safe only... no semi-auto function) 














Stemple 76/45 - STG 1928 and 100 round drum firing at the Ohio Thompson Collectors Shoot July 2013.  
Ammo used: Tula steel cased 45 ACP, 230 gr





Stemple 76/45 - STG 1928 Ringtone for iPhone

 Be careful where you use this.


Custom Case






2006 Patterns by JR Stemple

  • Not drum-compatible
  • (Upgrade price to current pattern $1250)

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1) This product is a new parts package installed on a registered/transferable Stemple 76/45 machinegun receiver.

2) This product is comprised of a registered/transferable Stemple 76/45 machinegun receiver, parts made by BRP CORP, and authentic Thompson submachinegun parts.

3) This product is not an authentic/original Thompson submachinegun.

4) This product is not made or endorsed by the current or former owners of the THOMPSON trademark. 

  • Stemple 76/45 Takedown Gun (STG) M1A1/1928 setup
    $11,700.00 Stemple 76/45 Takedown Gun (STG) M1A1/1928 setup
    The Stemple STG M1A1/1928 is assembled from an original Stemple 76/45 machine gun receiver, newly made Stemple-compatible parts, and several original Thompson components.  The Stemple 76/45 machine gun...