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Stemple Takedown Gun (STG) U45/U9 Package


Product Description

U45/U9 Package

This package is a subgunner's dream.  All in one box you've got a complete package to shoot 45ACP with Grease Gun mags or 9mm with Suomi drums and one suppressor to work with both calibers.  Switching calibers simply requires changing the bolt, barrel, and magazine housing.  It features 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.  

The package include the following parts: 

• Stemple (STG) U45 Machine Gun with Heavy Bolt System: Variable weight bolt system with hydraulic buffer that allows shooters to customize performance with a variety of different ammo as well as the 45 to 9mm caliber conversion.

• 2 x M3 Grease Gun Magazines

• U9 Converison (bolt, barrel, magazine housing)

• 2 x Suomi Drums

• 1 x Suomi Magazine

• Custom Hard Case

• 45 ACP suppressor for use with both 45 ACP and 9mm setups

• foregrip, bipod, multi-tool, & barrel locknut/muzzle cap tool

  (sights not included)


U45 Data

Select-Fire with Quick-Change Barrel

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

Magazine: M3 Grease Gun (unmodified) 30 rds

Weight: 9.3 lbs

Cycle Rate: 500-650 adjustable

Barrel Length: 10.35" threaded .578-28 to use common suppressor

U9 (SF) Conversion Data:

Magazine: Suomi KP31 25 rd, 36 rd, 50 rd magazines and 40 rd & 70 rd drums

Cycle Rate: 550-800 adjustable 

Barrel Length: 10.35" threaded .578-28 to use common suppressor





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.   

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.

Takes standard AR grips, Ace pattern & AR pattern stocks, as well as a variety of shroud, barrel, & mounting options.

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
  • Stemple U9 Slo...
    Machine gunner in this video is competitive shooter Emily Nich...
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