Semi auto tube for the STERLING MK4

This tube has a reduced inner diameter with the outer diameter matching an original. Fully compatible with our Sterling Mk4 semi auto kit (STRL-SAK) and cannot accept an original bolt.

The ends have been bored out to accept bushings.

The high-quality template includes necessary critical dimensions and vent holes have already been drilled. 

A milling machine is recommended to finish this tube; however, it is possible to finish it with a dremmel tool. 

You may need additional USA made parts in order to be R922 compliant. This tube is not a finished receiver; the buyer can make a semiautomatic receiver from it. No FFL required. All ATF rules apply.

Note: MIG or TIG welding is required for assembly.