The Rock River Arms Coyote Upper Assembly is a purpose-built AR-15 upper receiver designed for predator hunting and field use. The assembly centers around a 16" chrome-moly barrel with a 1:9 twist rate, optimized for common predator hunting ammunition weights. The upper features RRA's forged 7075-T6 aluminum receiver paired with their mid-length free-float handguard system, providing a balanced platform for quick target acquisition while maintaining accuracy for longer shots. The handguard incorporates M-LOK attachment points for accessories like bipods and lights, essential for predator hunting scenarios. The assembly includes RRA's chrome-lined bolt carrier group with properly staked gas key, and their specialized flash hider designed to minimize visible signature during low-light hunting conditions. The mid-length gas system provides reliable cycling while reducing felt recoil for quick follow-up shots. Additional features include a match-grade chamber, enhanced feed ramps, and standard dust cover. The upper maintains compatibility with standard AR-15 lower receivers and magazines, while the flat-top receiver design accommodates a wide range of optics options. The entire assembly receives RRA's premium finishing treatments, including a manganese phosphate coating on the barrel and hard-coat anodizing on the receiver and handguard, ensuring durability in harsh field conditions.