An AR-15 pistol upper assembly’s a complete upper receiver unit designed for AR-15 pistols, typically featuring a short barrel (7″–10.5″), hand guard, gas system (usually pistol length), and often a bolt carrier group and charging handle. It works with AR-15 pistol lower receivers, buffer tubes, magazines, and standard AR-15 parts. This assembly is ideal for building or upgrading compact, maneuverable AR-15 pistols for home defense, tactical use, or range shooting.
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