NOT KNOWN DETAILS ABOUT KNIGHTS ARMAMENT SR-15 CQB 11.5 UPPER

Understand that the MAS direct impingement style lowered the number of reciprocating pieces during the bolt group to only six: the bolt copyright, the bolt overall body, the extractor, ejector, firing pin and recoil spring. It will take only seconds to disassemble the bolt mechanism for maintenance.* These hold the conventional black e3 bolt and up