CMMG is a leading manufacturer of AR-15 and AR-15 related accessories. CMMG's commitment to quality and creating product at the best value at the best price is unmatched. This complete upper receiver is designed to connect seamlessly with your existing AR-15 or AR-15 pattern lower receiver. For your convenience, a bolt carrier group is included and everything on this complete unit features a matte black finish.
Specifications and Features:
CMMG Complete Upper Receiver 55BE184
5.56 NATO (accepts .223 Remington)
16" M4 profile, WASP treated 4140 Chrome-moly steel barrel
1:9" Twist rate
Railed gas block
Full Auto M16 bolt carrier group