This is a semiautomatic bolt system for the German MP-28. This system is designed around our (MP28-SAT) and will accept an original extractor and cocking handle for an authentic look. This kit includes the following high quality American made parts: a semiauto bolt, standard AR-15 firing pin, roll pin, firing pin spring, bolt stop, guide rods, 2 sets of springs, and assembly instructions.

Please note: This design is based on our ATF approved STEN MK3 model. Other US made parts may be needed to be compliant with GCA 18 U.S.C. 922r.