Fail Zero Bolt Carrier Group - .450 Bushmaster Ar-15

Fail zero bolt carrier group.450 bushmaster ar-15

FEATURES
-Bolt & Extractor (.458 SOCOM & .450 Bushmaster compatible)
-Bolt Carrier
-Extractor
-Cam Pin
-Carrier Key
-Firing Pin

Other Features: Exo nickel boron treated, drop in install for most mil-spec.450 bushmaster uppers