Bolts

Wilson Combat

Wilson Combat Bolt Carrier Assembly for 5.56 NATO and .223 Rem with Polished Nickel Finish

Wilson Combat

Wilson Combat TR-BCA-SBN-556 Bolt Carrier Assembly for 5.56 NATO & .223 Rem

Franklin Armory

Franklin Armory AR Bolt Carrier Group for 5.56mm - Black Finish

Radian Weapons

Radian Weapons Enhanced BCG for AR-15 in Black – Model R0081

Daniel Defense

Daniel Defense Bolt Carrier Group Complete - Model 04-013-19032 for AR-15 Rifles