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Stemple Takedown Gun (STG) U45


Product Description


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.    

Stemple Takedown Gun - U45 (45ACP setup)

Heavy Bolt System for M3 Grease-Gun-like shooting performance 

Nickel Boron Plated Bolt

Stainless Steel Barrel

Magazine: M3 Grease Gun (unmodified) 30 rds

Weight: 9.3 lbs

Cycle Rate: 500-650 adjustable

Barrel Length: 10.35" threaded .578-28

The STG Universal 45 (U45) is our newest addition to the U Series setups for the Stemple 76/45 machine gun. They feature a simple, smooth-running blow-back system.  With the addition of a hydraulic buffer, these are the most smooth, controllable, and versatile subguns on the transferable market.  It's so smooth due to the weight, layout, and action; you can actually watch your target being hit through a 4x scope while shooting long bursts.   This setup utilizes AR pattern stocks, AR pattern grips, and multiple picatinny mount options for maximum versatility.  Shooters can customize their preferred rates simply by adjusting the bolt parts.


Parts and Accessories Included With Each Gun: 

foregrip, bipod, two 30rd magazines, multi-tool, barrel locknut/muzzle cap tool (sights not included)


The U45 setup uses the same U Lower Assembly, Barrel Shroud, and Heavy Bolt System as the U9 SF.  If you already own a U9 SF, the U45 conversion kit consists of the bolt, barrel, and mag housing.


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. Some of our customers who own the 9mm guns liken the full-auto performance to a laser beam.

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 pistol ammo cannot create enough heat in the barrel to cause a malfunction or damage the gun.  There's no gas system to clog, and the open-bolt system negates any cook-off risk.


Product Videos

Stemple Shoot 2015 (04:32)
Stemple Memorial Shoot July 2015 featuring some of the old and new parts BRP makes for these pre-1986 receivers.
  • Stemple Shoot ...
    Stemple Memorial Shoot July 2015 featuring some of the old and...
  • Stemple U45
    Pre-production testing the the U45 setup for the Stemple 76/45...
  • BRP Range Day ...
    MACHINE GUN FUN!!!! Stemple Subguns, MG42, Vickers MMG
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