Needing some replacement parts for your Bolt Carrier Group? No worries, CMMG has you covered! Each Bolt Carrier Group Repair Kit comes with the following items: Bolt 9mm OR .40 S&W- Choose Accordingly. Firing Pin Firing Pin Retainer Pin Key (RDB) Key Screw X 2 Bolt Cam Pin Extractor Ejector Ejector Spring Bolt Spring (RDB) Mfg: Cmmg
