BCM® M16/AR-15 Bolt Assembly HPT-MPI

Premium Upgrade for M16/AR-15 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). Watch the video below to learn more about our quality control for Bolts and Bolt Carrier Groups! Detailed Specifications: .223/5.56 NATO/.300 BLK AR15/M16 Full Auto Heat treated Machined to USGI specifications Made from No. 158® Steel High Pressure Tested (HPT) Magnetic Particle Inspection (MPI) Superfinished Body NOTE: C.I.P. NOT included MADE IN THE USA