KAK Industry AR-15 5.56 / .300 BLK Bolt Carrier Group

Engineered for reliability, precision, and long-lasting performance, the KAK Industry AR-15 5.56 / .300 BLK Bolt Carrier Group (BCG) is the ultimate upgrade for your AR-15 rifle. Built to Mil-Spec, this 5.56 / .300 BLK BCG is full-auto rated and features a heat treated 8620 steel carrier with a chrome lining and corrosion-resistant finish. The bolt is shot peened, magnetic particle inspected (MPI), and crafted from aircraft/bearing quality 9310 steel. The firing pin is machined to Mil-Spec standards and is constructed of chrome-plated 8740 steel. Plus, this BCG features a NIB cam pin, S7 tool steel ejector and extractor retaining pin, and a NIB 4130 steel gas key that’s precision staked. Made in USA.