An AR-15 lower receiver is the core component of an AR-15 rifle, housing the fire control group, magazine well, and buffer system. It works with AR-15 upper receivers, lower parts kits, buffer tubes, stocks, magazines, pistol grips, and trigger assemblies. The lower receiver is essential for assembling or customizing an AR-15, providing compatibility with a wide range of standard AR-15 parts for hunting, target shooting, or tactical builds.
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