st gw manual

8/2/2019 St Gw Manual

1/23

STG, Pag

STG-WStemple Takedown GunStemple -Suomi

Owners Manual


2/23

STG, Page 2

UnmodiedStemple 76/45Machinegun

Receiver

Buttstock

Bolt &CockingHandle

TakedownScrew

Trigger

HousingAssembly

Removable Trunion

Breakdown View

Buffer

Lock Nut

Stock Tang

Mainspring

Mag Housing andBarrel Jacket As-sembly (short &long setups)

The Stemple 76/45 is roughly a 45ACP version of the 9mm S&W 76. The S&W 76 design washeavily inspired by the Swedish K/Carl Gustov M45. The M45 uses the same barrels and magazinesas the Swedish M37. The M37 is a short-barreled version of Finlands KP31. Since the Stemple76/45 drew its roots from the Finnish KP31, it was a natural t to use original Finnish and Swedishparts in the Stemple 76/45 system.

In 2003, BRP CORP, along with the help of the original inventor, John Stemple, manufactured therst Stemple Takedown Gun (STG) setups. These are complete accessory packages for unmodied/

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 ofassembly is ATF approved. These machineguns are fully transferable to individuals.

Finnish KP31-based Setups

Weight: 12 lbMagazine: Suomi KP31 25 rd, 36 rd, 60 rd magazines, and 40 rd &

70 rd drums

Rear Sight: Finnish KP31 500M Tangent or Picatinny Rail

Barrel Length: 12.5 in., 7.5 in.

Cycle Rate: 750 rpmFinish: Black

Bipod: Detachable


3/23

STG, Pag

Stemple Takedown Gun (STG) ManualThe STG is a blow-black submachinegun that requires knowledgeable operators. Full and completeadherence to the following instructions is an absolute necessity for safe and responsible use of theSTG. This system is NOT meant for anyone other than individuals knowledgeable in the safe operation

of machineguns and who have a thorough understanding of automatic rearms. If you are not such anindividual you pose a danger to yourself and those around you by using this system.

The Essentials of Running The STG:

Following these steps will help you use this system reliably and prevent malfunctions,

dangerous operation, and damage.

1) Following Loading Protocol: Do not retract the bolt until you intend to re.

2) Correct Ammo: Use full metal jacketed ammo only to ensure proper feeding.

3) Correct Mags & Drums: Drums and mags are not dimensionally consistent; contactBRP CORP for tting if necessary. Make sure that each Magazine or Drum locks on

the Magazine Latch and does not rock back and forth in the Magazine Housing.

4) Lubrication: Use lubricant sparingly on the outside edges of the Bolt.

5) Cleaning: When cleaning the STG, pay special attention to cleaning the bolt face,barrel, and feed ramp.

6) Inspection: After cleaning, fully inspect and reassemble the STG.

Spare Parts Manufactured by BRP: Sear Ejector Bolt

Lock Nuts Trunion Mag Housing / Barrel Jacket

Cocking Handle Lower Assembly

The Differences Between the Original Suomi and the STG

The STG res from the open-bolt position just as the original Suomi. The major components of the STG aremostly Suomi 31. A newly manufactured magazine sleeve and barrel shroud assembly is designed to sleeveover the STG lock nut and give the appearance of a Suomi barrel shroud. The Suomi bolt has been reducedin diameter to t the Stemple 76/45 receiver and hole pattern drilled for a new cocking handle compatible with

the cocking handle slot of the Stemple 76/45 receiver. The Suomi trigger housing has been modied to t the76/45 sear opening. The internal components are the same, however the sear is newly manufactured. Thetrigger housing system has a 3-position setup: safe, semi, full.

The following Suomi parts and accessorieswill work with the STG: Magazines and Drums Slings

Extractors Firing Pins Barrels (collar may have to be modied)

Internal Trigger Housing Components Mainspirngs


4/23

STG, Page 4

Safety Your Responsibility

SAFETY MUST BE THE FIRST AND CONSTANT CONSIDERATION OF EVERY PERSON WHO HANDLESFIREARMS AND AMMUNITION. This manual is designed to assist you in learning how to use and care for thissystem properly.

Only when you are certain you fully understand the manual and can properly carry out its instructions shouldyou practice loading, unloading, etc. with live ammunition.

If you have doubts about your ability to handle or use this particular system safely, then you should seek super-vised instruction. Such personalized instruction is often available from gun dealers, gun clubs or police depart-ments. If none of these sources can help you contact the National Rie Association. You are also encouraged

to contact BRP CORP for assistance.

The person with a gun in his possession has a full-time job. He cannot guess; he cannot forget. He mustknow how to use his rearm safely. Do not use any rearm without having a complete understanding of itsparticular characteristics and safe use. Remember: There is NO such thing as a foolproof gun.

Basic Safety List

A loaded rearm has the potential to kill. Intelligently handled it is safe.

An accident is always the result of basic safety rules neglect.

Accident prevention is user responsibility.

Never point a rearm at anything you dont want to shoot.

Before handling a rearm be sure to use correct and undamaged ammunition.

Be sure your rearm is clean before loading inspect the barrel to insure it is perfectly clean and free offoreign objects. Shooting with an obstruction in the barrel such as dirt, mud, grease, lodged bullet or jacket,

residues, etc, can cause barrel bulging and/or rupture.

Never assume that the chamber is empty, visually inspect it every time you handle the gun.

Avoid alcoholic beverages or drugs before and during shooting.

Avoid hard hitting or dropping of a loaded rearm.

Store rearms and ammunition separately, beyond the reach of children. Be sure cartridge chamber is

empty.

Thoroughly clean the rearm to prevent corrosion.

Wear eye and ear protection.

Firearms Safety Course is recommended.

Handle it with respect not fear.


5/23

STG, Pag

1. Loading the Magazines and Drumsa. Magazines

There are numerous magazines manufactured for the Suomi 31&37. Make sure that the magazinets properly and test its ability to feed using dummy rounds.

When lling the magazines, make sure that the rounds are rmly pressed against the rear of themagazine.

b. Drum

You may ll the drum to capacity or only load small amount of ammo. The drum operates on a con-stant force spring otherwise know as a clockwork spring located in a spring cage in the center of thedrum. The spring causes the cage, pusher arm, and base plate to rotate clockwise.

Open the drum by pressing the ratchet release pin and rotating the locking arm away from the re-taining shoulder.

Charge the drum by winding the cage counterclockwise. The ratcheting mechanism will click as

you wind the cage. Each click is approximately 10 rounds and represents a locking point for theratcheting mechanism. Only charge the drum to the point you want to load it. At a certain point, ap-proximately 5 clicks, the base plate will start rotating with the cage and pusher arm.

Once the cage and base plate cannot rotate any further, start loading the drum bullet tip up. You

will need to do this on a at surface so the rounds do not tip over. Be very careful not to press the

ratchet release button, it will release the full force of the spring and possibly crack the feed lip. Once full, press the ratchet release button and make sure that there is sufcient force pushing therounds toward the feed lip to feed the gun during cycle. Place the cover plate over the drum body,

press the ratchet release pin and rotate the locking arm toward the retaining shoulder.

2. Loading the Gun With the bolt forward insert the drum or magazine into the magazine housing and smack into place

making sure that the magazine catch lever engages the magazine. Pull down on the magazine tomake sure that the magazine or drum is properly engaged.

Be careful to not press the magazine catch lever when holding the gun.

3. Firing the Guna. Retract Bolt to the end of the cocking track

b. Pull Trigger4. Unloading the Gun

a. With rounds still in magazine. The bolt is the open position. Set the selector is set to the rear(SAFE). Push the magazine release lever forward and remove the magazine.

b. With empty magazine. The bolt is the closed position. Push the magazine release lever forward andremove the magazine.

Operation

Fire Control Selector

(Shown in Full Position)

Fully Forward: Full Auto

1 Click Rearward: Semi Auto

Fully Rearward: Safe


6/23

STG, Page 6

Disassembly Procedure

Step 1: Remove the Takdown Screw

Use the STG Multi-Tool or appropriate screwdriver to un-

screw the Takedown Screw (approx. 6 rotations)

Takedown Screw

STG Multi-Tool

Fitted TakedownScrew Tip


7/23

STG, Pag

Once the screw stops ris-ing from the receiver, holdthe Buffer and pull the screw

upward from the receiver.

Remove the Buffer.

BufferPad

BufferRod

Step 2: Remove the Buffer

TakedownScrew

Buffer

Mainspring

Retract the Bolt and Cocking Handle to the end of the Cocking Handle Track, pull the CockingHandle out of the right side of the Receiver, and dump the bolt out of the rear end of the Receiver.

Cocking

Handle

Bolt

Step 3: Remove the Bolt and Cocking Handle


8/23

STG, Page 8

Step 4: Separate the Upper & Lower Assemblies

Takedown Pin

Pusher

Takedown Pin

TakedownPin Hole

Use the multi-tool takedown pin pusher to remove the HK-style takedown pin from the rear of themagazine housing area. Lift the upper assembly from the lower assembly.

Step 5: Separate the 76/45 Receiver from the Barrel Jacket / Magazine HousingAssembly

Barrel ShroudTakedown Pin& Retainer

Screw

Remove the barrel shroud takedown pin by unscrewing the takedown pin retainer, then pushing the takedownpin out with the multi-tool. At this point the barrel shroud can be removed from the magazine housing.

Remove the magazine housing by pulling it forward and away from the receiver. Do not twist to remove since

it will scratch the metal nish.


9/23

STG, Pag

At this point, no further disassembly is required forregular cleaning.

Parts to Thoroughly Clean After Any Shooting

Bolt FaceAll parts listed should be soaked,brused and/or wiped with CLP until

free of residue.

Compensator

Barrel: You can run thecleaning rod through therear of the Receiver

Feed Ramp, Rear Barrel Face,& Ejector

Step 6: Remove the Barrel

Unscrew the barrel lock nut and pull the barrel from the receiver. You should use the BRP lock nut wrench,rubber strap wrench, or adjustable wrench to unscrew the locknut. Be very careful not to mar the lock nut.

You should add a drop of Lock-Tite (blue/non-permanent) to the threads of the trunion to prevent the lock nut

from vibrating loose during use

Barrel LockNut


10/23

STG, Page 10

Be careful not to pull the trigger with the selector inthe middle position when disassembled. The sear will

disconnect from the trigger and you may loose the sear

spring & plunger

When separated from the 76/45 receiver, the middle/semi position is only for disassembly ofthe trigger pack. Typically, there is no need to disassemble the lower assembly as pictured.

Optional Bipod Setup

To remove the bipod simply unscrew the socket head cap screw

at the top of the bipod and detach from the base.


11/23

STG, Page

Assembly Procedure

To install the Mainspring and Buffer Assembly:

Be careful to follow these instructions, otherwise, you may bend the mainspring- Pull the bolt back to the sear catch area.

- With the Mainspring and Buffer Assembled; install the Mainspring into the rear of the Bolt making surethat it guides into the opening in the rear of the Bolt.

- While pulling back on the Mainspring against the Buffer Block and Buffer Rod, push the BuffeAssemblyforward making sure that the Mainspring continues to guide on the Buffer Rod and rear of the Bolt, and

the Buffer Block guides into the rear of the receiver.

- Once the Buffer Base is at the rear of the Receiver, guide the Bolt forward.

- Grasp the Lower Trigger Housing Assembly and squeeze it to the Receiver.

- Push the Buffer Assembly forward until the holes in the Buffer, Receiver, and Lower Trigger Housing As-sembly line up

- Push the Takedown screw through the Receiver until it stops on the Buffer Base.

- Use the STG Muli-Tool or appropriate Screwdriver to tighten the Takedown Screw. (there is no need forexcessive torque)

Reverse operations 6, 5, and 4 until you have

the STG-W as pictured.


12/23

STG, Page 12


13/23

STG, Page


14/23

STG, Page 14


15/23

STG, Page


16/23


17/23

STG, Page

Top view of full-auto-onlysear system and RearPost

Step 1: Insert the Bolt and Cocking Handle Assembly

Step 2: Insert the Mainspring & Buffer Assembly

To ensure that the Mainspring and Buffer Rod are properly guided into the rear of the Bolt, retract theBolt and grasp the Upper Receiver assembly as pictured as you push the Buffer & Mainspring assem-bly forward.


18/23

STG, Page 18

Step 3: Insert the Alignment and Guide Tool

Make sure that the groove on the Buffer Cap is facing down.

Insert the Alignment and Guide Tool through the top of the Receiver. This will retain the Buffer andMainspring assembly and maintain rear Buffer and Receiver alignment with the Rear Post.

Alignment & Guide Tool(stainless steel)

Rear Post(stainless steel)

Takedown Keeper

Screw

Guide Pin

Step 3: Attach the Upper Assembly to the Rear Post


19/23

STG, Page

Firmly seat the Guide Pin part of the

Alignment and Guide tool into the top ofthe Rear Post.


20/23

STG, Page 20

Push down on the Upper Assembly so the

Rear Post Guides into the bottom of theReceiver and Buffer.

Once fully pushed down, the Alignment and Guide Tool will fall from the top of the Receiver.


21/23

STG, Page

Step 4: Attach the Rear Keeper Screw (loosely)

Step 5: Attach the Mag Housing and Shroud Assembly

Carfully guide the Mag Housing and Shroud Assembly into the slot at the front of the Trigger Housingassembly. Make sure that it is rmly seated at the back for Trigger Housing assembly to ensure proper

hole alignment.

Loosely attach the Rear Keeper Screw so the MagHousing and Shroud Assembly can slide easily intoposition.


22/23

STG, Page 22

With one hand, grasp and

squeeze the Upper and Lowerassemblies. With you otherhand, insert the HK takedown

pin from the right side of the

rearm.


23/23

Step 6: Tighten the Rear Keeper Screw

Use the tted multi-tool to tighten the RearKeeper Screw. Excessive torque is not

required.

st gw manual

Documents