Semi auto tube for the SUOMI 31

This tube has a reduced inner diameter and an outer diameter matching an original. Fully compatible with our SUOMI semi auto kit (S31-SAK) and will not accept an original bolt. The front barrel lugs have been machined and the threads for the end cap have been turned. It will accept a barrel and shroud. 

The high-quality template includes necessary critical dimensions for the tube.

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.