This BCA AR-15 complete 5.56 Nato rifle length upper has a 16" M4 contour barrel with a black nitride finish, and features a 1:7 twist rate, with a mid-length gas system. It includes a 15 1/4" MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a right-side charging (Gen2) handle (patent protected). This 5.56 Nato upper is compatible with any mil-spec AR-15 lower. This has the new handguard. Includes optic, side post flip sights and light/laser combo. This is a complete RTR upper. I’m open to trade for a complete lower, I might be interested in other firearms but I’m mainly looking for a lower. I’m located in Chubbuck and I would prefer to meet locally.