CMMG AR15/M16 Auto Bolt Carrier Group HPT-MPI

CMMG® M16 Bolt Carrier Group, Auto version, for AR15, M16, M4 premium builds or firearm upgrades. Chrome lined Bolt Carrier and Chrome lined Gas Carrier, machined to original USGI specifications. Specs: For caliber: .223 Rem/5.56 Nato/.300 AAC Compatible to AR-15/M16 Mil-Spec Diameter Uppers & Barrels Spec: Auto BCG Chrome lined Bolt Carrier Chrome lined Gas Key Chrome Plated Firing Pin Machined to USGI specifications Bolt made from 9310 Steel, Phosphate Finish Carrier made from 8620 Steel, Chrome Lined, Phosphate Finish Extractor made from 4140 Steel, Phosphate Finish Gas Key properly staked per Mil-Spec Specifications Bolt Cam pin with Mil-Spec phosphate coating High Pressure Tested (HPT) Magnetic Particle Inspection (MPI) Forward Assist Serrations MADE IN THE USA NOTE: C.I.P. NOT included MADE IN THE USA