F-1 Firearms DuraBolt Silver direct impingement full auto rated AR10 bolt carrier group is compatible with DPMS spec large frame receiver sets and associated components. The DuraBolt Silver is enhanced with a Physical Vapor Deposition (PVD) coating, which gives it an extremely durable and corrosion resistant silver mirror finish. The Durabolt  caoting also offers excellent lubricity with a low coefficient of friction.

Carpenter 158 bolt, ground after heat treat, MPI and HPT
9310 steel carrier, ground after heat treat
Due to current demand, please allow up to 30 days for shipment