Bushmaster Upper M4A3 223 16 inch Black

BUSHMASTERA(R) M4A3 PATROLMANS CARBINE UPPER ASSEMBLYa Similar to the M4-type carbine but w/additional barrel length a 4150 chrome moly-vanadium steel barrels features hard chrome lining in bore & chamber a Forged lightweight 7075-T6 aircraft-quality aluminum & M16A2-designed receiver includes integral brass deflector bolt catch assembly & raised ribs a Hard anodized finish a Factory headspaced test-fired & ready-to-use Cal. Brl. 5.56 NATO/.223 Rem. 16"