2022 Update: For 2022 we are introducing 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, guns setup with STG1928 parts are fully compatible with the other Stemple 76/45 compatible parts in the Universal line: U9, U45, U9SF, & Stemple Suomi.
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.
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.
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
- 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)
- extra forend vertical: ($120)
- extra sear assembly: ($95)
- extra barrel threaded 5/8-24: ($160)
- extra standard barrel assembly with front sight and locknut:($250)
- extra barrel locknut: ($30)
- extra mainspring: ($12)
- extra bolt assembly: ($425)
- extra extractor: ($30)
- extra 50 rd drum: ($199)
- extra magazine ($50)
- Add Atlantic Coast Machine 9” Suppressor: ($450)
- Add Atlantic Coast Machine 12” Suppressor: ($550)
- Bowers Vers 45 Suppressor $850
- Short Suppressed Setup: Add 3” barrel threaded 5/8”-24, offset hand guard, reduced power mainspring, and vertical grip ($250)
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.
Videos Hide Videos Show Videos
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5 Reviews Hide Reviews Show Reviews
A few of my neighbors and I went out to the Big Sandy Machine Gun Shoot. We took one of your Suomi guns and a STG 1928. They ran like well oiled machines. Thank you for making such a great product!
This is an excellent subgun that always turns heads at the range. Minus the markings on the receiver it’s very hard to tell it apart from an actual Thompson at first glance. Despite having a different design internally it handles very similarly to an M1A1 from my experience so far. If you’re looking for a Thompson to shoot at the range this may be a better option overall. It handles very similarly, has replacement parts currently being produced, BRP and Brian are still going strong and a pleasure to work with, several thousand dollars cheaper then any other model of Thompson, can still be purchased “new”, and ultimately if you decide the M1A1 setup is not for you nothing is welded to the registered tube so you can convert it to another model from BRP. All in all this is another outstanding machine gun and definitely worth considering if a Thompson is on your shopping list.
I cannot say enough about the quality & exceptional customer service experience. Brian & his crew are top notch. This firearm is a pleasure to shoot, easy to control, and easy to take apart. My only regret is not buying one sooner, and more of them. I would recommend to anyone who wants a something they can actually shoot & not be afraid of expensive/difficult parts replacement. It is extremely well-made, durable, and a great long-term investment. I’d give it 10 stars if I could.
I purchased my gun a few years ago. What a blast!!! Gun runs great and is very fun to shoot! Brian is very supportive of his products. I will definitely by from him again. Mine cycles through cheap ammo great. I just picked up 100 round drum but haven't run it through the gun yet. I always loved the Thompson SMG probably from watching Vic Morrow running around with his as I was a kid watching Combat. Thanks for offering a great gun!!
I purchased this Stemple 76/45 M1A1/1928 as it resembles my wife’s favorite, the iconic Thompson. This model actually has several of its original components on it. It was an unexpected pleasure to have received everything (except the receiver tube) right after ordering it. Once it cleared NFA and I received the tube, I took it home and promptly put it together. The excellent manual made it very easy to assemble. On the range, shooting from an open bolt, it ran inexpensive .45 cal ammo through it without any problems whatsoever. Follow up outings produced the same excellent results. What a great and fun gun to shoot! I couldn’t be happier with its appearance and performance. I am thoroughly pleased with my purchase. It’s doubtful that you can purchase an affordable, new subgun, with never ending support from such a dedicated, knowledgeable, cordial and professional company, anywhere else. I highly recommend BRP guns!