failzero-m16-m4-bolt-carrier-group-no-hammer-completely-assembled-exo-nickel-boron-coated-nickel-finishbca-ar-15-.223-5.56-nato-.300-blackout-bolt-carrier-groupwilson-combat-5.56-bcgfailzero-m16-m4-bolt-carrier-group-no-hammer-black-nitride-coated-black-finishbca-ar-15-7.62x39-bolt-carrier-groupbravo-company-manufacturing-ar-15-bolt-carrier-group-m16sons-of-liberty-gun-works-bolt-carrier-group-223-remington-556nato-manganese-phosphate-finishar-15-bolt-carrier-group-ionbond-flat-dark-earthar-15-bolt-carrier-group-exo-nickel-boron-coated-nickel-finishsons-of-liberty-gun-works-bolt-carrier-group-scalper-556nato-manganese-phosphate-finishcmmg-ar-conversion-kit-22lr-stainless-steel-bolt-group-3-magazines-25rdall-stainless-steel-constructionincludes-anti-jam-charging-handle-cleaning-jag-guide-rod-forward-assist-adaptor-and-a-25rd-magazine.works-in-most-5.56-.223-chambered-rifles.luth-ar-bolt-carrier-group-assembled-.308-bolt-carrier-assemblyrise-armament-ar-10-.308-dpms-pattern-complete-bolt-carrier-group-black-nitridear10-bolt-carrier-group-exo-nickel-boron-coated-nickel-finish