RRA CMPLT MID A4 UPR 450BM 16 5RD

The Rock River Arms CMPLT MID A4 UPR 450BM 16 5RD is a complete upper receiver assembly designed for AR-15 platforms. Featuring a 16-inch chrome moly barrel with a 1:24 twist rate, this upper is chambered in .450 Bushmaster, providing robust performance for a variety of shooting applications. The mid-length gas system is paired with a lightweight free-float handguard compatible with M-Lok accessories, offering flexibility for customization and improved barrel cooling.

This upper assembly includes a precision-machined bolt carrier group and a charging handle, ensuring reliable cycling and ease of operation. The integrated Rock River Arms Operator Brake, threaded 5/8-32, helps manage recoil and muzzle rise. The unit comes finished in matte black anodized coating for durability and corrosion resistance. Additionally, it includes a 5-round magazine, completing the setup for those assembling or upgrading their rifle. The Rock River Arms CMPLT MID A4 UPR 450BM 16 5RD exemplifies quality craftsmanship and functionality for enthusiasts seeking a high-performance upper receiver.