An AR-15 lower and upper set consists of the two main receiver components of an AR-15 rifle: the lower receiver (housing the fire control group, magazine well, and buffer system) and the upper receiver (housing the barrel, bolt carrier group, and charging handle). This set works with barrels, handguards, gas systems, bolt carrier groups, buffer tubes, stocks, magazines, and lower parts kits. It forms the foundation for custom AR-15 builds, offering compatibility with all standard AR-15 components for hunting, target shooting, or tactical use.
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