A 7.5″ 300 Blackout upper is a compact upper receiver assembly for AR-15 pistols, featuring a 7.5-inch barrel chambered in 300 AAC Blackout. It typically includes the upper receiver, hand guard, gas system (usually pistol length), and sometimes a bolt carrier group and charging handle. This upper works with AR-15 pistol lower receivers, compatible buffer tubes, magazines, and standard AR-15 parts, making it ideal for maneuverable, close-quarters builds focused on home defense, tactical use, or range shooting.
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