FailZero

FailZero EXO M16/4 Bolt Carrier Group - Nickel FailZero M16/M4 Bolt Carrier Group, No Hammer to guarantee your rifle performs in any situation. These Bolt Carrier Groups made by FailZero come...

FailZero EXO 5.56/.223 M16 Bolt Carrier Group - Nickel Boron Not all Nickel Boron is created equal and FailZero is the undisputed pioneer of Nickel Boron technology. When failure is not an option,...

FailZero EXO 5.56/.223 M16 Bolt Carrier Group - Black Nitride Not all Nickel Boron is created equal and FailZero is the undisputed pioneer of Nickel Boron technology. When failure is not an option,...

FailZero EXO 9mm Bolt Carrier Group Black Nitride 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...