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  • M16/4 Full-Auto BCG – Black
    Fail Zero

    M16/4 Full-Auto BCG – Black

    A completely assembled, ready to install Full-Auto BCG Description This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers.  All critical parts are coated with EXO Nickel Boron technology that provides permanent...
  • M16/4 Full-Auto BCG
    Fail Zero

    M16/4 Full-Auto BCG

    A completely assembled, ready to install Full-Auto BCG Description This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers.  All critical parts are coated with EXO Nickel Boron technology that provides permanent...
  • FZ Lightweight BCG
    Fail Zero

    FZ Lightweight BCG

    Description 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 wear and corrosion resistance....
  • FZ Black Nitride 9mm AR9 BCG
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    FZ Black Nitride 9mm AR9 BCG

    A completely assembled, ready to install Black Nitride AR9 9mm Bolt Carrier Group Description This 9mm Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The FailZero Black Nitride 9mm BCG is compatible with...
  • EXO 9mm AR9 BCG
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    EXO 9mm AR9 BCG

    Description This 9mm AR Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The FailZero 9mm BCG is compatible with both lowers designated for Glock or Colt magazines. All critical parts are coated with...
  • Full-Auto Black Nitride BCG
    Fail Zero

    Full-Auto Black Nitride BCG

    Description This BCG is designed for shooters looking for a tactical advantage resulting from the non-reflective properties of Black Nitride.The carrier comes with a Black Nitride finish for great corrosion protection and wear resistance. This Bolt Carrier Group (BCG) comes fully assembled and ready...
  • AR15 Semi-Auto BCG – Black
    Fail Zero

    AR15 Semi-Auto BCG – Black

    Description 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 wear and corrosion resistance....
  • AR15 Semi-Auto BCG
    Fail Zero

    AR15 Semi-Auto BCG

    A completely assembled, ready to install Semi-Auto Bolt Carrier Group Description 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...

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