A*B Arms Pro 5.56 NATO Bolt Carrier Group - Nickel Boron - ABABCGNiB - $119.95 Description A*B Arms is built stronger because sometimes, lives are on the line. Their products stand up to the rigors of combat, police and private security operations, where failure is not an option. The A*B Pro 5.56

American Built Arms Company PRO 5.56 Bolt Carrier Group - $143.06 The AB Arms PRO Advanced Rifle Bolt Carrier Group is specially made to have exacting tolerances and surface finishes and built to Mil-Spec dimensions. These Bolt Carrier Groups by American Built Arms Company are built of 8620 steel

A*B Arms Pro 5.56 NATO Bolt Carrier Group - Nickel Boron - $119.99 A*B Arms is built stronger because sometimes, lives are on the line. Their products stand up to the rigors of combat, police and private security operations, where failure is not an option. The A*B Pro 5.56 Bolt Carrier Group is a