Fail Zero Bolt Carrier Group - 5.56mm Full Auto Ar-15

Fail zero bolt carrier group 5.56mm full auto ar-15

FEATURES
-Bolt & Extractor (5.56/.223 compatible)
-Bolt Carrier
-Extractor
-Cam Pin
-Carrier Key
-Firing Pin

Other Features: Full auto bcg, exo nickel boron treated, drop in install for most mil-spec m16/m4/ar15 uppers