Suomi KP31 & Swed 37 SMG KITS

KP31 Suomi SEMI AUTO HEADSPACE pattern 9mm Barrel 16" Threaded 1/2-28

16" barrel for Semi Auto KP31.   Works with slant pattern KP31 shroud.  Will work with compensated shroud if the exit hole is opened to .635".   HEADSPACE on Closed Bolt Semi Auto Guns vs Open Bolt / Fixed Firing Pin Blow Back...

Torch Cut KP31 Suomi Receiver

Original Finnish KP31 Torch Cut Receiver   The cuts are severe as pictured.

Suomi KP31 / Swed M37 Screws: Stock and Trigger

Includes the trigger screw and trigger screw keeper, and stock/tang screw