The Modified Cycle System 9mm Bolt Carrier Group is specifically designed for MCS use.
The Modified Cycle System 9MM Complete Bolt Carrier Group is a shortened version of the Glock/Colt style mag, 9MM BCG. BCG WEIGHT- 9.9 oz. BCG LENGTH- 5.5″. Finish- Black Nitride. Intended for use with the Dead Foot Arms Modified Cycle System®