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STEN Mk5 Tube

Item # MK5SAT
Price $75
Weight 1 lb 3 oz

New and improved! Tube for the STEN MK5 from which the buyer can make a semiautomatic receiver. New design allows you to use the hook safety like the originals. The precision high quality template is CAD drawn and is glued to the aerospace grade 4130 DOM receiver tube. Designed to work with our semi auto build kit and will not accept a fully automatic bolt when finished. 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. Design is based on our ATF approved MK3 model.

STEN Mk5 Build Kit STEN Bolt

Item # MK5SAK
Price $280
Weight 2 lb

New and improved design! Semiautomatic build kit for the STEN MK5. 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 tubes, and an original MK5 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, rod retainer, 2 sets of springs, and assembly instructions. Two small parts need to be welded together. Please note that the bolt uses a STEN MK2 or MK3 style extractor. Design is based on our ATF approved MK3 model. Other US made parts may be needed to be compliant with GCA 18 U.S.C. 922r.

STEN Mk5 Barrel

Item # MK5-9B16
Price $260
Weight 1 lb 10 oz

9mm 16" barrel for the STEN MK5. These barrels are made from high quality steel and have a 10 groove right hand twist. The end of the barrel has the tabs milled into it for the front sight as well as the bayonet lug. Chambered and ready to install.

STEN Mk5 Original Barrel STEN Mk5 Original Barrel

Item # MK5B
Price $225
Weight 1 lb

9mm STEN MK5 standard length barrel, brand new. Made from high quality steel. The end has the tabs milled to accept the front sight, bayonet lug, and is machined to factory specs. Chambered and ready to go.

Barrel Extension

Item # MK5BE
Price $20
Weight 8 oz

STEN MK5 Barrel Extension. The barrel extension is a non-rifled tube that is slipped over and welded to the existing barrel.

Magazine Housing Conversion Kit

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

Price $20
Weight 1 oz

Extractor for the STEN MK2,MK3, or MK5. This is a new Sten extractor and is an exact copy of an original. Made from quality American steel and hardened.

STEN Mk5 Trigger Housing

Item # MK5TH
Price $200
Weight 1 lb

This is a new trigger housing for the STEN MK5. This trigger housing will work with original trigger components from the STEN MK2, 3, or 5. The pistol grip block will accept an original British screw. The frame has the holes to work with the scap in or pinned on dust covers. Made in the USA from steel.

STEN Mk5 Hand Guard

Item #MK5BHG
Price $65
Weight 6 oz

This is a STEN MK5 hand guard. Made to the exact specifications of the original ones.

STEN Mk5 Barrel Nut

Item #MK5BN
Price $35
Weight 4 oz

Barrel nut for the STEN MK2 or MK5.

STEN Cocking Handle

Price $17
Weight 1 oz

This is a new reproduction cocking handle for the STEN and will fit the STEN MK2, MK3, or MK5. CNC machined from 4140 tool steel and very high quality.

STEN Disconnector

Price $15
Weight 1 oz

This is a new US made STEN disconnector that will work with the STEN MK2, MK3, or MK5. Heat treated and higher quality than the original part. It is a r922 compliant part.

STEN Mk5 Ejector

Item #MK5E
Price $12
Weight 1 oz

Ejector for the STEN MK2 or MK5.

STEN Mk5 Ratchet Paw

Item #MK5RP
Price $15
Weight 1 oz

This is a new US-made ratchet paw for the STEN MK2 or STEN MK5.

STEN Mk5 Barrel Screw

Item #MK5BS
Price $35
Weight 2 oz

Barrel screw for the STEN MK2 or MK5. Made from hardened 4140 tool steel. Can be used to make custom handguards, or silencers if you have the proper FFL. No FFL required for purchase.

STEN Mk5 Barrel Screw

Item #MK5GS
Price $20
Weight 2 oz

This is a new grade 8 screw for the STEN MK5 pistol grip. It has the correct British threads to fit an original trigger housing or one of our reproductions.

STEN Trigger Return Spring

Price $8
Weight 1 oz

STEN trigger return spring NEW. Will fit the MK2, MK3, and MK5.

STEN Sear Pin

Price $10
Weight 1 oz

This is a new sear pin for the STEN MK2,MK3, or MK5. Made from hardened tool steel.


Price $8
Weight 1 oz

A set of recoil and hammer springs for our semi-auto build kits.


Copyright Indianapolis Ordnance. All Rights Reserved. Last Updated 5/21/17