Introducing our MIL-SPEC AR-15 Bolt Carrier Group. Improvements include using 9310 tool steel for the bolt, nitriding the assembly for greater surface hardness, less resistance, and superior corrosion resistance compared to typical chrome and bolt carrier groups. All bolts are fully MPI tested to ensure the material is sound and without defects. Bolt lugs are chamfered 45 degrees to ensure reliable action for even the highest pressure loads and fast lightweight actions
