Rock River Arms Completed Upper Receiver Left Handed RAGE .223/5.56mm 10.5 Inch Barrel 1-9 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hider

Rock River Arms

Overview

The Rock River Arms Completed Upper Receiver is designed specifically for the AR-15 platform and comes fully assembled, making it a convenient choice for builders looking to streamline their project. Featuring a 10.5-inch barrel with a 1:9 twist rate, this upper is optimized for stability and accuracy with a variety of ammunition types in the 5.56 NATO caliber. The 1/2x28 thread pitch is standard for attaching muzzle devices, while the free-float handguard enhances precision by minimizing barrel movement. This upper receiver is commonly found in compact builds intended for close-quarters engagements or tactical applications.