BattleHawk Armory AR-10 .308 / 6.5 Creedmoor Nickel Boron Bolt Carrier Group - Special Buy Engineered for Excellence - Battle-Tested Reliability Upgrade your AR-10 platform with the BattleHawk Armory Arma Nickel Boron BCG, proudly etched with our Hawk Head logo and built to deliver unmatched precision, performance, and durability. This BCG is crafted by one of the most respected OEM producers in the industry-trusted by over 75 leading firearms manufacturers-and now available directly from BattleHawk Armory at a special price.