The Rise Armament RA-6ARC-CU-GRY-18 AR15 CMPT UPPER 6ARC GRY upper receiver assembly blends precision engineering with a sleekCopper Gray finish to deliver a reliable platform for AR-15 enthusiasts seeking enhanced accuracy in 6mm ARC, a caliber prized for its ballistic efficiency and versatility. Built by Rise Armament, this upper is crafted as a complete CMPT upper that integrates seamlessly with compatible AR-15 lower receivers, enabling a straightforward upgrade path for hunters and target shooters alike. The 6mm ARC designation signals its optimized geometry for long-range performance, delivering flatter trajectories, reduced recoil, and improved hit probability on varmint, predator, or medium-game targets without sacrificing handling or maneuverability. With its robust construction and thoughtful tolerances, the upper supports consistent cycling and dependable performance across varied field conditions, making it a dependable choice for setup-focused builds or refinements to existing configurations. Ideal for serious shooters who demand repeatable results from a streamlined, ready-to-install upper, this Rise Armament option is designed to help you push the limits of precision shooting while maintaining a clean, professional profile.