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STEN MK3

STEN Mk3 with vented receiver

Semi Auto STEN MK3 built with Vented receiver


STEN Mk3 Dummy Gun

STEN MK3 Dummy gun built with Original Style dummy receiver



STEN Mk3 plain receiver

Item # MK3SAPT
Price $75.00
Weight 2 lb

Semiautomatic partially machined receiver tube "PLAIN STYLE" for the STEN MK3. We have six styles of MK3 tubes available. This tube is plain which means that it has no venting holes around the barrel shroud or a sight rail. All of our MK3 tubes have the same functional dimensions. This is made from high quality American 4130 DOM tubing and designed to work with our conversion kit. When finished, this tube will not accept a fully automatic bolt. The high quality template is CAD drawn and includes critical dimensions and assembly tips. The front of the tube is bored out to accept the original front barrel bushing. The back of the tube is bored out to accept the original spring cup and retaining ring. You will need a dremmel tool or milling machine and a welder to assemble. This design has been classified by the ATF as a firearm and not a machinegun.



STEN Mk3 receiver with sight rail STEN Mk3 plain receiver

Item # MK3SAOT
Price $120.00
Weight 2 lb

Semiautomatic partially machined receiver tube "ORIGINAL STYLE" for the STEN MK3. We have six styles of MK3 tubes available. This tube is "original" which means that it has the full length sight rail, 5 venting holes, letter stamp on the front, and holes in the sight rail just like the original ones do. The sight rail is straight and firmly welded into position so it won't break off. All of our MK3 tubes have the same functional dimensions. This is made from high quality American 4130 DOM tubing and designed to work with our conversion kit. When finished, this tube will not accept a fully automatic bolt. The high quality template is CAD drawn and includes critical dimensions and assembly tips. The front of the tube is bored out to accept the original front barrel bushing. The back of the tube is bored out to accept the original spring cup and retaining ring. You will need a dremmel tool or milling machine and a welder to assemble. This design has been classified by the ATF as a firearm and not a machinegun.



STEN Mk3 vented receiver STEN Mk3 plain receiver

Item # MK3SAVT
Price $110.00
Weight 2 lb

Semiautomatic partially machined receiver tube "VENTED STYLE" for the STEN MK3. We have six styles of MK3 tubes available. This tube is vented which means that it has a 52 hole pattern drilled around the barrel shroud. The holes are drilled before the template is put on. All of our MK3 tubes have the same functional dimensions. This is made from high quality American 4130 DOM tubing and designed to work with our conversion kit. When finished, this tube will not accept a fully automatic bolt. The high quality template is CAD drawn and includes critical dimensions and assembly tips. The front of the tube is bored out to accept the original front barrel bushing. The back of the tube is bored out to accept the original spring cup and retaining ring. You will need a dremmel tool or milling machine and a welder to assemble. This design has been classified by the ATF as a firearm and not a machinegun.



STEN Mk3 vertical plain receiver

Item # MK3VSAPT
Price $75.00
Weight 2 lb

Semiautomatic vertical magazine feed partially machined receiver tube "PLAIN STYLE" for the STEN MK3. We have six styles of MK3 tubes available. This tube has the magazine port located so that the magazine will be in the vertical position which is similar to the MP-40. This tube is plain which means that it has no venting holes around the barrel shroud or a sight rail. All of our MK3 tubes have the same functional dimensions. This is made from high quality American 4130 DOM tubing and designed to work with our MK3 vertical bolt conversion kit. When finished, this tube will not accept a fully automatic bolt. The high quality template is CAD drawn and includes critical dimensions and assembly tips. The front of the tube is bored out to accept the original front barrel bushing. The back of the tube is bored out to accept the original spring cup and retaining ring. You will need a dremmel tool or milling machine and a welder to assemble. This design has been classified by the ATF as a firearm and not a machinegun.



STEN Mk3 receiver with sight rail STEN Mk3 vertical receiver with sight rail

Item # MK3VSAOT
Price $120.00
Weight 2 lb

Semiautomatic vertical magazine feed partially machined receiver tube "ORIGINAL STYLE" for the STEN MK3. We have six styles of MK3 tubes available. This tube has the magazine port located so that the magazine will be in the vertical position which is similar to the MP-40. This tube is "original" which means that it has the full length sight rail, 5 venting holes, letter stamp on the front, and holes in the sight rail just like the original ones do. The sight rail is straight and firmly welded into position so it won't break off. All of our MK3 tubes have the same functional dimensions. This is made from high quality American 4130 DOM tubing and designed to work with our MK3 vertical bolt conversion kit. When finished, this tube will not accept a fully automatic bolt. The high quality template is CAD drawn and includes critical dimensions and assembly tips. The front of the tube is bored out to accept the original front barrel bushing. The back of the tube is bored out to accept the original spring cup and retaining ring. You will need a dremmel tool or milling machine and a welder to assemble. This design has been classified by the ATF as a firearm and not a machinegun.



STEN Mk3 vented receiver STEN Mk3 vertical vented receiver

Item # MK3VSAVT
Price $110.00
Weight 2 lb

Semiautomatic vertical magazine feed partially machined receiver tube "VENTED STYLE" for the STEN MK3. We have six styles of MK3 tubes available. This tube has the magazine port located so that the magazine will be in the vertical position which is similar to the MP-40. This tube is vented which means that it has a 52 hole pattern drilled around the barrel shroud. The holes are drilled before the template is put on. All of our MK3 tubes have the same functional dimensions. This is made from high quality American 4130 DOM tubing and designed to work with our MK3 vertical bolt conversion kit. When finished, this tube will not accept a fully automatic bolt. The high quality template is CAD drawn and includes critical dimensions and assembly tips. The front of the tube is bored out to accept the original front barrel bushing. The back of the tube is bored out to accept the original spring cup and retaining ring. You will need a dremmel tool or milling machine and a welder to assemble. This design has been classified by the ATF as a firearm and not a machinegun.



STEN Mk3 Build Kit STEN Mk3 Build Kit

Item # MK3SAK
Price $250.00
Weight 2 lb

Semiautomatic build kit for the STEN MK3. This closed bolt system works extremely well and eliminates the problems of kits offered by other companies. You will need this kit, one of our partially machined MK3 receiver tubes, and an original MK3 parts kit in order to build a legal semi automatic firearm. This kit includes the following high quality American made parts; a semi-auto bolt, cocking handle, standard AR-15 firing pin, roll pin, firing pin spring, bolt stop, guide rods, rear barrel bushing (reduced diameter), rod retainer, hammer, recoil springs, barrel extension, and assembly instructions. Two small parts need to be welded together and the hammer needs to be flame hardened (explained in instructions). The barrel extension is a non-rifled tube that is slipped over and welded to the existing barrel. It is not included if you order a 16" barrel at the same time. This design has been classified by the ATF as a firearm and not a machinegun. 922r compliant.



STEN Mk3 Build Kit STEN Mk3 Vertical Bolt

Item # MK3VSAK
Price $280.00
Weight 2 lb

Semiautomatic vertical feed build kit for the STEN MK3. The bolt in this kit is machined to allow feeding from a vertically mounted magazine housing similar to the MP-40. This is not a modified standard semi auto bolt but a specially machined bolt. This closed bolt system works extremely well and eliminates the problems of kits offered by other companies. You will need this kit, one of our partially machined MK3 vertical feed receiver tubes, and an original MK3 parts kit in order to build a legal semi automatic firearm. This kit includes the following high quality American made parts; a semi-auto bolt, cocking handle, standard AR-15 firing pin, roll pin, firing pin spring, bolt stop, guide rods, rear barrel bushing (reduced diameter), rod retainer, hammer, recoil springs, barrel extension, and assembly instructions. Two small parts need to be welded together and the hammer needs to be flame hardened (explained in instructions). The barrel extension is a non-rifled tube that is slipped over and welded to the existing barrel. It is not included if you order a 16" barrel at the same time. This design has been classified by the ATF as a firearm and not a machinegun. 922r compliant.



STEN Mk3 barrel

Item # MK3B16
Price $95.00
Weight 1 lb 10 oz

16" barrel for the STEN MK3. These barrels are made from high quality steel and have a 10 groove right hand twist. The front barrel bushing will have to be drilled out to 5/8". Chambered and ready to install.



STEN Mk3 Magazine Housing

Item # MK3MH
Price $95.00
Weight 8 oz

This is a brand new magazine housing for the STEN MK3. They are beautifully crafted to exact tolerances for consistent fit and function. These are made better than the originals and contain heat treated components for a long life. These housings are made in the USA and are 922r compliant.



Magazine Housing Conversion Kit

Item # MHCKIT
Price $70
Weight 7 oz

This kit will allow you to convert your STEN MK3 magazine housing into a STEN MK2 or MK5 housing. Kit comes with full instructions and necessary hardware (shown in picture). Other parts are needed to convert an entire MK3 parts kit to a MK2 or MK5. A great item for those wanting a hard to find MK2 parts kit. Some cutting and welding required for assembly.



STEN Extractor

Item # STENEX
Price $30.00
Weight 1 oz

Extractor for the MK2 and MK3 Sten. This is a new Sten extractor and is an exact copy of an original. Made from quality American steel and hardened.




STEN Mk3 Rivets STEN Mk3 Rivet

Item # MK3RIVETS
Price $7.00
Weight 1 oz

Set of 12 rivets for the STEN MK3. These are special splined drive rivets that are easier to install than traditional press fit rivets.




Rivet Tool

Item # MK3RTOOL
Price $15.00
Weight 2 oz

Rivet punch tool for the STEN MK3. Designed to easily drive rivets without slipping or smashing the heads flat. Hardened for a long life.




Springs

Item #SPRINGS
Price $8.00
Weight 1 oz

A set of recoil and hammer springs.


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