AR-15 Bolt Head 5.56

5.56 PHOSPHATE BOLT COMPLETION KIT

Rubber City Armory 5.56 M16 Carrier

Fail Zero Nickel Boron Bolt 5.56

RCA 5.56 Enhanced Bolt

Anderson M16 5.56/.223 Complete Bolt and Carrier Group

TNTE M16 9310 Bolt Carrier Group Assembly .223/5.56

Fail Zero M16/M4 Bolt Carrier Group Black Nitride

TNTE M16 Mil-Spec Bolt Carrier Group Assembly .223/5.56 - Black Nitride - Made in U.S.A.

RRA 5.56 Phosphate BCG AR-15 (Semi Auto Only)

PHASE5 BOLT CARRIER GROUP M16 BLK

LUTH AR BCG COMPLETE 556/223