Brownells M16 Bolt Carrier Group 6.5 Grendel for AR-15

M16 Bolt Carrier Group Features The Brownells 6.5 Grendel Bolt Carrier Group provides users with a caliber-specific bolt carrier assembly that ensures reliable premium performance at an affordable price. The Brownells 6.5 Grendel ARC Bolt Carrier Group is constructed with two separate kinds of steel. The bolt itself is fabricated from 9310 while the carrier is built using 8620 hardened steel. After machining the bolt is completed with shot peening and heat treatment. Magnetic-particle inspected Extractor installation includes rubber insert and spring Features correct gas-key torqueing and staking Bolt finished with black-nitride coating Type 2 Bolt Bolt face depth is .136 In addition to the bolt each 6.5 Grendel / 6mm ARC Bolt Carrier Group includes bolt carrier and gas key also features a firing pin cam pin and a firing pin retaining pin. M16 Bolt Carrier Group Specifications Brand: Brownells Model: M16 Bolt Carrier Group Cartridge: 6.5 Grendel Finish: Black Nitride Make: AR-15 Delivery weight: 0.327kg Height: 25mm Width: 38mm Length: 181mm