ARMALITE M15/M16 Bolt Carrier Group HPT-MPI Auto

Original ArmaLite® M-15 Bolt Carrier Group, auto version, for AR15, M16, M4 firearm upgrades or new premium builds. Chrome lined Bolt Carrier and Chrome lined Gas Carrier, machined from the correct Mil-Spec Carpenter No. 158® steel and machined to original USGI specifications. Specifications: For caliber: .223 Rem/5.56 Nato/.300 AAC Compatible to M-15/AR-15/M16 Spec: Auto BCG Chrome lined Bolt Carrier Chrome lined Gas Key Chrome Plated Firing Pin Machined to USGI specifications Made from No. 158® Steel Finish: Mil-Spec phosphate coating Gas Key with Grade 8 fasteners with a Torque from 55 inch lbs Gas Key properly staked per Mil-Spec Specifications Bolt Cam pin with Mil-Spec phosphate coating High Pressure Tested (HPT) Magnetic Particle Inspection (MPI) Heat treated Forward Assist Serrations MADE IN THE USA NOTE: C.I.P. NOT included