The Battle Arms Development WORKHORSE complete upper receiver 5.56 NATO 16-inch barrel in black (WH-UR16B-Y-15) is a ready-to-run, mil-spec AR-15 assembly engineered for reliability, accuracy, and modularity in demanding duty, competition, or range environments - featuring a durable 4150 Chrome-Moly Vanadium nitride barrel for enhanced corrosion resistance and longevity with a wide range of ammo, a lightweight M-LOK handguard for accessory freedom, and premium internals like the BAD-RACK-15 ambidextrous charging handle for intuitive manipulation from any angle. This upper drops onto any mil-spec lower in seconds, delivering consistent performance out of the box with its 1:7 twist rate optimized for 55-77 grain projectiles, while the integrated gas block and enhanced BCG ensure smooth cycling and reduced recoil for faster follow-ups.
Compatible with all mil-spec AR-15 lowers - the workhorse upper that performs without compromise.
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