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STG U9 & U9-SF

Stemple Takedown Gun (STG)  U9



U9 - Standard Bolt System 

The STG Universal 9 (U9) 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 similar to the Suomi M31 which yields a cyclic rate of 750 rounds per minute.  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 a rigid AK/ACE side-folding stock, AR pattern grip, and a variety of shroud and barrel options for both heavy and light setups.


U9 Slow Fire (SF) - Heavy Bolt System

The Slow Fire (SF) utilizes an adjustable-weight bolt system to dissipate the energy in the recoiling mass during the cycle process.  This is an ideal system for shooters looking to maximize suppressor performance by increasing dwell time in the chamber thereby reducing port noise. The cyclic rates with this system are adjustable between 525 to 900 round per minute.  Shooters can customize their preferred rates simply by adjusting the bolt parts.  At the lowest rate, this gun has a sustained fire of approximately 9 seconds with a 70-rd drum. 








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.

Price: $8400 (Includes foregrip, bipod, 2 drums, 1 magazine, multi-tool, spare buffer, barrel locknut/muzzle cap tool, choice of barrel and shroud setup, and choice of standard rate or heavy bolt system setup)

Package Deal: $8750 (Includes all of the parts listed above as well as the Suppressor and Custom Hard Case)


Select-Fire with Quick-Change Barrel
Caliber:   9mm
Weight: 8 lbs with MN shroud/barrel, 9.7 lbs with Suomi M31 shroud/barrel
Magazine: Suomi KP31 25 rd, 36 rd, 50 rd magazines and 40 rd & 70 rd drums

(sights not included)


Standard Rate Setup with Folding Stock (750rpm)









STG suppressor with removable end caps and easy-to-clean baffles
(takes place of existing muzzle cap at end of threaded barrel).  $425







STG U Series Case: Custom routed HD foam instert designed to fit the U9, U9 Slow Fire & U45

Case: $475

9mm Silencer:  $425







MN Shroud for 10" & 16" barrels (threaded 1/2"-28) 





M31 Slant Shroud for 12.75" barrel (unthreaded)




M31 Compensated Shroud 12.75" barrel (unthreaded)







 Stock Options

The U9 Buffer uses the ACE-pattern screw mount (2 x 10-32 threaded holes) for attaching the stock assembly.  The Skeleton Stock can be used with or without the folding stock mechanism.  Also, there are numerous other adapter and stock sets that are also compatible with the U9 Buffer.   These include the following:

Cheek Riser: http://riflestocks.com/store/product4.html

ACE Original Skeleton Stock: http://riflestocks.com/store/product3.html

Folding Stock Mechanism: http://riflestocks.com/store/product105.html

(M4M) M4 Six Position Collapsable Modular Stock: http://riflestocks.com/store/product5.html

(M4-M-FS) M4 Six Position, Side Folding Collapsable Stock: http://riflestocks.com/store/product6.html

(UL-M-FS) Ultra Light Modular Side Folding Stock: http://riflestocks.com/store/product10.html

(M4S(M)) M4 SOCOM Modular Stock: http://riflestocks.com/store/product8.html







Assembly and Disassembly