A 5.56 pistol kit is a complete set of components for building an AR-15 pistol chambered in 5.56 NATO. It typically includes a short barrel (usually 7″–10.5″), upper receiver, handguard, gas system, bolt carrier group, charging handle, lower parts kit, buffer tube, and pistol brace. The kit works with AR-15 lower receivers and standard AR-15 parts, making it ideal for compact, maneuverable builds suited for home defense, tactical use, and range shooting.
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