Rise Armament RA6ARCCUBLK18 6 ARC 18in Upper for AR15 1x7 Twist WatchmanXR

The Rise Armament RA6ARCCUBLK18 WatchmanXR 6MM ARC complete upper receiver for AR-15 delivers a precision-ready platform in a rugged 18-inch stainless steel barrel paired with a 1:7 twist for stable long-range performance, built on a durable aluminum upper receiver assembly. This Rise Armament offering combines a dedicated 6 ARC caliber with a reliable, easy-to-configure upper that is designed to maximize accuracy, velocity consistency, and broad ballistic efficiency for precision shooting, predator control, and high-performance varmint hunting. The WatchmanXR assembly integrates proven components and streamlined geometry to promote clean, repeatable chambering and rapid, repeatable follow-up shots, while the stainless barrel ensures corrosion resistance and enduring shootability in challenging field conditions. Ideal for enthusiasts who demand tight groupings at extended distances, this upper receiver is engineered to pair seamlessly with compatible AR-15 lowers, presenting a cohesive platform for dialing in longer-range hits. With its sleek black finish and robust construction, the RA6ARCCUBLK18 upper embodies Rise Armament's commitment to accuracy, reliability, and straightforward assembly, empowering shooters to elevate their rifle builds and achieve consistent performance across a variety of shooting scenarios.