The Radian Model 1 Complete Upper is engineered for the .300 AAC Blackout caliber and features a 9-inch barrel finished in black nitride. This complete upper receiver is designed for use with AR15 platforms, ensuring a reliable and streamlined performance.Key FeaturesBarrel Length: Features a 9-inch barrel optimized for compact builds.Barrel Finish: Black nitride finish enhances durability and corrosion resistance.Color: Finished in black for a sleek and tactical appearance.