Stemple Takedown Gun (STG)

In 2003, BRP CORP, along with the help of the original inventor, John Stemple, manufactured the first Stemple Takedown Gun (STG) setups. These are complete new parts packages installed on unmodified/transferable Stemple 76/45 machine gun receiver tubes. These ‘takedown’ systems of interlocking subassemblies can be easily attached to and removed from the 76/45 receiver. This method of assembly is ATF approved. These machineguns are fully transferable to individuals.

Finnish KP31-based Setups

The Stemple 76/45 is roughly a 45ACP version of the 9mm S&W 76. The S&W 76 design was heavily inspired by the Swedish K/Carl Gustov M45. The M45 uses the same barrels and magazines as the Swedish M37. The M37 is a short-barreled version of Finland's KP31. Since the Stemple 76/45 drew its roots from the Finnish KP31, it was a natural fit to use original Finnish and Swedish parts in the Stemple 76/45 system.

STG-76: The STG-76 fits the "heavy submachinegun" concept by incorporating a bipod. Bipods were not uncommon on early SMGs such as the Finnish KP31 and the Czech ZK383. The STG-76 is assembled using numerous newly manufactured Stemple-compatible parts, Suomi KP31 components, a HK-style stock and grip, and an unmodified/registered Stemple 76/45 machine gun receiver.

STG-76W: The STG-76W more closely resembles the original Finnish KP31 by using the original Finnish KP31 wood stock & fire-control housing.

Caliber: 9mm
Weight: 12 lb
Magazine: Suomi KP31 25 rd, 36 rd, 60 rd magazines and 40 rd & 7 0rd drums
Rear Sight: Finnish KP31 500M Tangent or Picatinny Rail
Barrel Length: 12.5 in., 7.5 in.
Cycle Rate: 750 rpm
Finish: Black Oxide/Black Annodize
Bipod: Detachable

5/27/08: Video's of Suppressed Setup.:STG76 Suppressed Spray (High Res) STG76 Suppressed Spray (Low Res)

The price of the gun from this video is $7800. It has only had this one drum used in it for the video then thoroughly cleaned. This is also the only time the suppressor and sight have been used

This gun includes a quad-rail forend, 2 drums, 2 mags, bipod, foregrip, AAC Evo 9 suppressor with box and carrying sleeve, barrel nut wrench, barrel cap for threads when supprssor is not used, EO Tech 553 sight with original box, multi-tool and spare buffer

STG-76/M31 Shown with long Finnish barrel setup, removable bipod, and compensator - It's basically an LMG w/ a sub caliber

Full disassembly

STG Operator's Manual click on link for pdf download

Price: $7000
 Comes w/ 1 mag, 1 drum, multi-tool, spare buffer & bipod

Options & Spare Parts
Picatinny Rail Rear Sight Base: $50
Foregrip with mount: $60
Bipod: $25
Bolt: $200
Barrel: $75
Ejectors: $25
70 rd Drums: $40
36 rd Mags: $20
Trigger Pack: $75 (select fire), $65 (full auto only)

STG-76W

Stemple Suomi

First Shown at Knob Creek 4/7/06

Vintage looks and functions like Finland's Winter War Suomi KP31 or Swedish/Suomi M37

Video: STG W Drum Dump w/ select fire

STG-76/31W (shown w/ Finnish KP 31 barrel and sling)

Each STG-76W comes 1 drum, 1 magazine, spare buffer, multi-tool, & sling

STG-76/31W (shown w/ optional bipod)

STG-76 31W disassembly

STG Operator's Manual click on link for pdf download

Price: $7000
Comes w/ 1 mag, 1 drum, multi-tool, sling & spare buffer

Package Deal: $7200
Comes w/ 2 mags, 2 drums, multi-tool, sling, spare buffer, barrel locknut wrench, and transit chest

Options & Spare Parts
Picatinny Rail Rear Sight Base: $50
Bipod with Mount: $50
Bolt: $200
Barrel: $75
Ejectors: $25
70 rd Drums: $40
36 rd Mags: $20
Trigger Pack Replacement Parts: $75
Sear: $50
Sling: $20

Stemple 76/45

July 8, 1949 - February 20, 2007

A good friend and mentor

He will be missed

Stemple's slow-fire 76/45 (variable 400-575 rpm)

.45 ACP only

M16 collapsible stock

M16 pistol grip

Takes Grease Gun Mags

Optional Suppressor w/ Barrel

Stemple 76/45

The Stemple 76/45 is best described as a .45 cal. version of the 9mm Swedish K (Carl Gustav). The Stemple 76/45 was originally developed and produced by John Stemple of Ohio. This design also shares many characteristics of the Smith & Wesson 76 9mm, which is more or less a copy of the Swedish K. The Swedish K was an updated replacement for the aging Suomi M-1931. In fact, many of the parts from the Swedish K are compatible w/ the Suomi M-31. Similarly, the Stemple 76/45 shares a limited compatibility w/ Suomi M-31 parts. Namely, the bolt diameters as well as the feed and ejection locations are the same for the Stemple 76/45, S&W 76, Swedish K, and Suomi M-31.

Swedish K

Suomi M-31

Stemple has produced the 76/45 in numerous configurations. The main differences are in the 3 parts that are typically welded to the receiver: rear grip / stock mount, mag housing, and trunion. Given that these parts are permanently attached to the receiver, it is difficult to make accessories that are compatible with all of Stemple's guns. Pictured above is one of the newer versions of the 76/45 that uses a compensated barrel, telescoping stock, M-16 grip, and a 'pull-button' magazine release.

Caliber conversions for the 76/45 have been available in .22 and 9mm. The 9mm conversion uses either Sten mags or Suomi mags and drums depending on the magazine well that was welded to the receiver. Stemple's latest innovation on the 76/45 is an ultra-slow firing 'match-grade' version with a refined MP-40-style trigger group, AR plastic stock, and Picatinny rail base.

Interesting Suomi Resources

The Suomi as a Sniper's Weapon?: http://www.mosinnagant.net/finland/simohayha.asp
http://www.winterwar.com/Weapons/FinSmallArms/FinAutomatics.htm
http://world.guns.ru/smg/smg52-e.htm
http://www.jaegerplatoon.net/MACHINEPISTOLS1.htm
http://guns.connect.fi/gow/suomi1.html
http://guns.connect.fi/gow/suomi2.html

Factoid: Simo Häyhä (6th Company of JR 34, Finnish Army) was credited with over 500 kills in his service during the Winter War with his service cut short as he was wounded on 3-6-40 by a Soviet sniper. He was an expert with the Suomi K31 SMG and a large number of the Soviets that he felled were from his K31. The total time that Simo Häyhä served in the Winter War was 100 days with about 500 kills credited to him. His record is truly remarkable and is long since remembered in the nation of Finland.
Source: http://www.kevos4.com/Simo_Hayha.htm

The Original Concept for the Heavy SMG

The ZK-383 is a heavy submachine gun of Czech origin used during World War II. Czechoslovakians used it, but only as a reserve. It was also issued to the Bulgarian military, as well as some German troops. It was in use after World War II by the Balkan states up until the 1960s.

It is sometimes considered to be a light automatic rifle, but the 9mm Parabellum ammunition is typical of a submachine gun. It stores the ammunition in a 30-round magazine. In addition, the gun has a bipod, a bayonet lug, and an extra long range sight, which is unusual for submachine guns.
Source: http://en.wikipedia.org/wiki/ZK-383

ZK-383