* Side Cocking Upper For Master Piece Arms .45 Acp

This side cocking upper works great on all semi auto Mac-10 .45 acp guns. It comes complete with a threaded barrel, picatinny rail mount and is ready to accept your bolt assembly and run on your lower. Works with all MPA .45 acp guns & Mac-10 .45 acp Semi Auto Open bolt and closed bolt guns.*BACK ORDER ONLY