M215 KM-7
5.56 or 7.62 NATO cal., 7 1/2 in. barrel, M4 feed ramps, case hardened 8620 steel Nitride coated, M4/AR-15 compatible, 7 in. KeyMod free float rail, Mil-Std 1913 top rail, forged upper receiver, Mil-Spec forward assist, dust cover, and bras...