AR-15 Bolt Head 5.56

5.56 PHOSPHATE BOLT COMPLETION KIT

Fail Zero M16/M4 Bolt Carrier Group Black Nitride

TNTE M16 C158 Bolt Carrier Group Assembly .223/5.56

5.56 M16 Nickel Boron Bolt Carrier Group

5.56 M16 BCG and Charging Handle Kit

5.56 M-16 Phosphate BCG with BCM Gunfighter

TNTE Enhanced M16 Mil-Spec Bolt Carrier Group Assembly 7.62x39 - Black Nitride - Made in U.S.A.

AXTS 5.56 Black Nitride Bolt Carrier Group

M16 Nickel Boron EXO Bolt Carrier Group

RADIAN ENHANCED BCG FOR AR15 BLK NIT

Hard Chrome 5.56 M16 / AR-15 Bolt Carrier Group