DuraBolt F-1 Firearms BCG 5.56

DuraBolt F-1 Firearms Black Nitride direct impingement full auto rated M16/M4 bolt carrier group, for use in AR15 platforms, is compatible with MIL-SPEC receivers and associated components. The bolt carrier and bolt are ground after heat treat to ensure tolerances.

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  • Carpenter 158 bolt, ground after heat treat, MPI and HPT
  • 8620 steel carrier, ground after heat treat

Additional information


Black Nitride, DLC Black, Gold, Silver, Rose Gold