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Nickle Boron-NiB

  • Fail Zero AR15 BCG, Semi-Auto Hammer

    This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers.  All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases...

    MSRP: $174.99
    $160.00
    Add to Cart
  • Fail Zero AR15 Semi-Auto BCG - No Hammer

    This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers.  All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both...

    MSRP: $159.99
    $150.00
    Add to Cart