Rock River Arms Tactical Carbine Complete Upper Receiver 458 Socom 16 Ar-15

The Rock River Arms Tactical Carbine Complete Upper Receiver in 458 SOCOM delivers a purpose-built AR-15 upgrade with a 16" barrel, RRA Operator Muzzle Brake, and a 15" free float M-LOK handguard, all in a durable black anodized finish that stands up to rugged field use. This complete upper includes a premium Bolt Carrier Group and Charging Handle Assembly, ensuring reliable cycling and fast, easy installation on compatible AR-15 platforms. Designed for precision and power, the 458 SOCOM chambering provides impressive short-range performance with enhanced stopping power, while the 16" length balances velocity and maneuverability for reliable field engagement. The 15" free-floating handguard supports accessory mounting and improved accuracy by isolating the barrel from external forces, and the anodized black finish helps resist wear in demanding environments. Whether upgrading a tactical setup or building a dedicated caliber-focused rifle, this upper receiver assembly offers a cohesive, ready-to-run solution that fits AR-15 receivers and aligns with rugged, operator-focused performance expectations. Suitable for rifle parts and complete upper receivers applications, it integrates seamlessly into your build with established reliability and modern styling.