Rock River Arms LAR-15M CLB Complete Upper, 458 SOCOM 16" Bull Barrel, Black - SOC0820V1

This Rock River Arms complete upper receiver assembly fits AR-15 platforms and features a 16" chrome moly bull barrel chambered in 458 SOCOM with a 1:16" twist rate. The upper includes a 13" M-LOK handguard, Beast brake muzzle device, and aluminum receiver with black finish. Installation requires mounting to a compatible AR-15 lower receiver.