This BCA AR-15 complete 300 Blackout rifle length upper has a 16″ heavy barrel with a 416R stainless steel finish, and features a 1:8 twist rate, with a carbine length gas system. It includes a 15″ MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and a side charging (Gen 2) handle. This 300 Blackout upper is compatible with any mil-spec AR-15 lower. This has the new handguard.
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