5.56 DURABOLT BOLT CARRIER GROUP (BCG)
F-1 Firearms DuraBolt Black direct impingement full auto rated M16/M4 bolt carrier groups are compatible with mil-spec receivers and associated components.
The DuraBolt Black is enhanced through Chemical Vapor Deposition (CVD) technology and is the hardest, smoothest, and most wear resistant carrier group available. The DuraBolt Black offers the lowest coefficient of friction on the market as low as .02 after our micro finishing process.
Link to parts manufacturerF-1 Firearms DuraBolt Black direct impingement full auto rated M16/M4 bolt carrier groups are compatible with mil-spec receivers and associated components.
The DuraBolt Black is enhanced through Chemical Vapor Deposition (CVD) technology and is the hardest, smoothest, and most wear resistant carrier group available. The DuraBolt Black offers the lowest coefficient of friction on the market as low as .02 after our micro finishing process.
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