Radian Weapons R0903 Model 1 Complete Upper 6mm ARC 18in Nitride Steel M-LOK

The Radian Weapons R0903 Model 1 Complete Upper in 6mm ARC delivers a precision-focused platform designed for rifle enthusiasts seeking reliability and performance in a streamlined upper receiver assembly. Crafted by Radian Weapons, this upper features an 18-inch steel barrel finished in black nitride for enhanced wear resistance and corrosion protection, paired with a robust M-LOK handguard that enables flexible accessory attachment and intuitive grip placement for dynamic field or range use. The 6mm ARC chamber provides excellent long-range performance, helping shooters achieve flat trajectories, reduced recoil, and precise follow-up shots, making it a versatile choice for varmint to mid-range tactical applications. With its clean, streamlined design, the complete upper integrates smoothly with compatible AR-pattern receivers, delivering dependable fit, quick installation, and repeatable accuracy for benchmark shooting sessions. The combination of premium steel construction, reliable nitride treatment, and measured ergonomics ensures consistent performance in diverse environments, whether dialing in distance at the range or adapting for diverse hunting and shooting scenarios. This Radian upper embodies thoughtful engineering, enabling shooters to maximize their 6mm ARC potential with confidence.