This Bear Creek Arsenal AR-15 Complete 5.56 rifle length upper has a 20″ Government Cold Hammer Forged barrel with a Black Nitride finish, and features a 1:8 twist, with a rifle length gas system. It includes a 15″ MLOK rail, a M4 flat-top billet upper receiver, a BCA bolt carrier group, flash hider, and a right-side charging (Gen2) handle (patent protected). This 5.56 upper is compatible with any mil-spec AR-15 lower.
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