AR15/M4 Bolt Carrier Group

Hodge Defense Systems bolt carrier groups are no frills, black nitrided bolt carrier groups with a 9310 bolt. When manufactured and heat treated correctly, 9310 is slightly stronger than Carpenter 158 bolts. 

HDSI BCGs feature an all-chrome gas key, are Magnetic Particle Inspected (MPI), properly staked, individually inspected for quality assurance, and individually test fired.