BCM® (HPT & MPI) Bolt Assembly
The BCM bolt assembly is machined from the correct Milspec Carpenter No. 158 steel, shot peened for increased strength, includes tool steel machined extractor, BCM Extractor Spring, and is HPT and MPI (Magnetic Partical Inspected).
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AR-15 BOLT CARRIER GROUPS AND CHARGING HANDLES
300 BLACKOUT BARRELS