DealAIM Bolt Carrier Group. Made in USA! Shot Peened MPI Bolt. 9310 Bolt Material, 8620 Carrier and Gas Key. M16 Full Auto Profile. Properly staked Investment cast gas key hardened to USGI specs, Fastened with Hardened Grade 8 Fasteners. Extractor O-Ring upgrade with Black Insert. Free Shipping! from Sunny State Outdoors (Product XAIMBCGNIBBDG) |