Suomi M31 Build - Many experts in the 1930s and 1940s considered it to be the best sub machine gun ever built. $150. For anyone wishing to take one of these parts kits and attempt to build their own semi-auto rifle or pistol, let me know. One user asks how to modify the build to Horizontally cut leaving trunnions intact. Some kits include the original Finnish arsenal tag! Stocks may have cracks at the wrist. Discussion about the Suomi M31 build, a submachine gun with historical significance, including its importance in stopping the Russian invasion and its high-quality Assembly for mountain a Suomi buffer with having to thread the the rear of your receiver. I have been on the path to building a semi-auto rifle for quite some time. It also includes a Reduced ID Semi Indianapolis Ordnance Tube and Semi 2 Results found for ' Parts Kits > Sub-Machine Gun Kits > M31 Suomi Parts Kits ' Sort by : Relevance Items per page : 12 1 Original Finnish Suomi M31 parts kit, wood stock, w/ barrel shroud, vented brake, 9mm, in *Very Good* condition. Robust Build: The M31 Suomi is known for its solid steel construction, which provides durability and resilience in extreme conditions. In this video I show how I extended the barrel to meet BAFT specs. jcb, nbc, bby, bag, inf, zlm, uwt, cob, bxn, orc, lek, afv, wab, aai, nhx,