An AR-15 complete upper’s a fully assembled upper receiver unit for AR-15 rifles, typically including the upper receiver, barrel, hand guard, gas system, bolt carrier group, and charging handle. It’s ready to install on an AR-15 lower receiver, working with magazines, buffer systems, and other standard AR-15 parts. The complete upper allows for quick caliber changes, upgrades, or new builds, making it ideal for target shooting, hunting, tactical, or custom applications.
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