Stemple 76/45 Takedown Gun (STG) M1A1/1928 setup

Product Description

Product Update Notes

2022: We introduced the new Internally Threaded Pattern (ITP) assemblies of the Stemple 76/45 receivers to offer a more streamlined and versatile system with enhanced compatibility among setups.  Per this previously approved method of attaching the trunion, separate trunions and bolt guides are no longer necessary for converting between the standard and heavy bolt systems. While these can still be used on the receiver, one trunion now does it all.  For example, the previous U9 conversion to the U9 slow fire setup required separate trunions/bolt guides, bolts, stocks, and buffers.  In the ITP setup only the stock and buffer assemblies are switched to add mass to the moving parts for lower cycle rates.  The bolt and trunion are unchanged.  The fire controls, stocks, and mag housings are also unchanged.  

The conversion from the U9SF to the U45 in the combination guns is also further simplified by having a much heavier 45 bolt so a second bolt extension is no longer necessary to reduce the cycle rate.

The STG1928 parts are also fully compatible with this setup. 

(See Product & Setup Chart)

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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. 

Parts and Accessories Included With Each Gun: 1 x 50 rd drum, 1 x choice of 20rd or 30rd mag, multi tool, wrench, choice of vertical or horizontal front grip, both Picatinny rear sight & standard "L" sight, choice of barrel:  M1 pattern barrel and the new compensated ones threaded 5/8-24, and custom hard case with high density foam.  

STG M1A1/1928 Data

Caliber: .45 acp

Barrel Length: 10.5 in. M1 Pattern Barrel, 10.5 in Threaded 5/8"-24 1928 Pattern, 3 in Threaded 5/8"-24

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)

Weight:  11 lbs (unloaded)

Simple / DurableDesign:  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 trunions easily deal with potential wear issues from any type of ammo.

Can't Get Too Hot:  These are ideal for machine-gun shoots. The low-pressure 45ACP round cannot create enough heat in the barrel to damage the gun.  There's no gas system to clog, and the open-bolt system negates any cook-off risk. 

Great Investment:  Just ask someone who bought a transferable machine gun 10-20 years ago how they feel about their purchase.  Most of them will say they wish they bought more.  Also ask someone who sold a machine gun 10-20 year ago how they feel about the sale.  Most of them will say they wish they never sold it.  Since the ban on new registrations in 1986, the finite supply of transferable machine guns availble for individuals in the US has steadily appreciated in value.

We put a lot of thought into preserving the Long-Term Value of these guns.  They are designed for maximum durability and serviceability.  The worst thing that can happen to a transferable machine gun is a damaged or broken receiver.  The parts that can wear out in these STG configurations are not the registered parts.  Further, the moving and impacted parts in the system are overbuilt for their function and easy to replace if necessary:  minimal effort,  zero fitting, and no need to send the gun to a specialist for repair.   We stock plenty of spare parts and provide free service.  These guns will outlast anything on the transferable market

Options: 

• Barrel type: M1 pattern front or compensated
• 20 or 30 rd magazine
• Horizontal or vertical fore-end
• Upgrade to original Thompson/Lyman adjustable rear sight. (+$190)

Add-ons - Discounted with Gun Purchase:

• extra forend vertical
•  extra sear assembly
•  extra barrel threaded 5/8-24: 
•  extra standard barrel assembly with front sight and locknut
  
•  extra barrel locknut
•  extra mainspring
•  extra bolt assembly
•  extra extractor)
•  extra 50 rd drum
•  extra magazine 
•  Add Atlantic Coast Machine 9” Suppressor
•  Add Atlantic Coast Machine 12” Suppressor
•  Short Suppressed Setup: Add 3” barrel threaded 5/8”-24, offset hand guard, reduced power mainspring, and vertical grip

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Trademark Info:

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.