An AR-15 upper receiver is a key component of the AR-15 rifle, housing the barrel, bolt carrier group, charging handle, and often the hand guard and gas system. It works with AR-15 lower receivers, barrels, hand guards, gas blocks, gas tubes, bolt carrier groups, charging handles, forward assists, dust covers, and optics or iron sights. The upper receiver’s essential for assembling, customizing, or upgrading AR-15 rifles, offering compatibility with a wide range of standard AR-15 parts for hunting, target shooting, or tactical use.
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