Ar-15 Bolt Carrier Assembly 5.56 Nato - M16 Bolt Carrier Assy 5.56 Nato Polished Nickel Boron

Manufactured by Wilson Combat's finest domestic Mil-Spec contractors, these are among the best 5.56 AR rifle bolts on the market and the same bolts they use as the basis of our renowned custom rifles! Wilson Combat's bolt is precision machined from Carpenter No. 158 steel, shot peened for increased strength and a includes a tool steel extractor and ejector, appropriate extractor spring, and is MPI (Magnetic Particle Inspected and randomly batch HPT (High Pressure Tested) . The extractor is 4140