Radian Model 1 Upper 18″ 6mm ARC – Gray | Precision AR Upper Receiver

Built without compromise, the Radian Model 1 18″ 6mm ARC Upper in Gray represents the pinnacle of American precision rifle craftsmanship. Engineered around a straightforward but demanding philosophy—source only the highest quality raw materials, employ the most precise CNC machining available, and integrate only the best components—the result is an upper receiver that seamlessly blends exceptional form with proven function.

The 18″ barrel chambered in 6mm ARC (Advanced Rifle Cartridge) delivers outstanding long-range accuracy, flat trajectory, and superior ballistic performance, making this upper an ideal choice for precision shooters, hunters, and serious competitors who demand more from their rifle platform.

Fully ambidextrous controls come standard, providing genuine utility for both left- and right-handed shooters without the need for aftermarket modifications. Every Radian Model 1 upper is assembled by hand, one at a time, by a trained gunsmith who personally inspects, test fires, and cleans each unit before it leaves the facility—ensuring it meets Radian’s famously rigid quality standards.

The subdued gray finish offers a clean, professional aesthetic that pairs beautifully with a wide range of lower receivers and accessories. No detail has been overlooked in the design or execution of this upper, which is why Radian backs every Model 1—like every product they make—with a lifetime guarantee.

Whether you’re building a precision hunting rifle, a long-range competition rig, or simply upgrading your existing AR platform, the Radian Model 1 18″ 6mm ARC Upper delivers the quality, accuracy, and reliability that discerning shooters expect.

Order online at Deep Roots Rifle Co for fast shipping, or stop by our gun store in Eustis, Florida, where our knowledgeable staff can help you find the perfect components to complete your build.