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Details of Alex Pro Firearms M16 Bolt Carrier Group 5.56x45mm/300 Blk Black Nitride
AR-15 5.56 Complete Bolt Carrier Group is designed to work easily and reliably in any AR-15 or M16 rifle chambered in 5.56x45mm, 300 AAC Blackout or .223 Remington.The APF M16 5.56 Complete Bolt Carrier Group is constructed with a bolt made from 9310 steel, which is finished with a heat treatment and shot peening. The carrier is fabricated from 8620 hardened steel. Each element of the bolt-carrier group is finished in a black-nitride coating.Features:Magnetic-particle inspected materialExtractor includes spring and rubber insertFunctions with any cartridge based on the 5.56 NATO cartridge caseMachined to Mil-Spec StandardsProperly Staked Gas KeyComplete Bolt Carrier Assembly, Drop-In ReadyBlack Nitride Finish