This Bear Creek Arsenal AR-15 Complete 5.56 rifle length upper has a 20″ heavy barrel with a black nitride finish, and features a 1:7 twist, with a rifle length gas system. It includes a Rifle Handguard, M16 style A2 Front Sight & Carry Handle, a M4 flat-top forged upper receiver, a BCA bolt carrier group, flash hider, and a rear charging handle. This 5.56 upper is compatible with any mil-spec AR-15 lower.
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