This BCA AR-15 complete 9MM pistol length bufferless (Patent Pending) upper has a 5″ M4 barrel with a parkerized finish, and features a 1:10 twist rate, with a blow back gas system. It includes a 4″ MLOK rail, an M4 flat-top billet upper receiver, a BCA bolt carrier group, a flash hider, and Gen 2 (patent pending) Side Charging handle, and fits on a mil-spec AR-9 Bufferless lower.
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