Cobalt Kinetics CK Pro URG 5.56 NATO 13.7″ Upper Receiver Group – Flat Dark Earth

Elevate your AR-15 build with the Cobalt Kinetics CK Pro Upper Receiver Group in 5.56 NATO, featuring a 13.7-inch barrel dressed in a premium Flat Dark Earth (FDE) finish. Cobalt Kinetics has built a reputation for precision manufacturing and innovative engineering, and the CK Pro URG is a direct reflection of that commitment — delivering the consistency, reliability, and quality that serious shooters and builders demand.

The 13.7-inch barrel configuration is a popular choice for builders seeking a compact, maneuverable platform. When pinned and welded to an approved muzzle device, this barrel length achieves the 16-inch overall length required for NFA-compliant rifle builds — making it an ideal option for those who want a shorter, more agile profile without the NFA registration requirements of a short-barreled rifle.

Whether you’re assembling a duty-ready carbine, configuring a precision competition rifle, or pursuing a premium custom home build, the Cobalt Kinetics CK Pro URG provides an exceptional foundation. Crafted with the exacting tolerances and high standards that define the Cobalt Kinetics brand, this upper receiver group is designed to perform when conditions get demanding.

At Deep Roots Rifle Co, we stock hard-to-find, high-performance components like the Cobalt Kinetics CK Pro URG because we believe serious builders deserve access to top-tier parts without the hassle. Order online at deeprootsrifleco.com and take advantage of our fast shipping, or visit our gun store in Eustis, Florida, where our knowledgeable staff can help you source the right components to complete your build. Competitive pricing, expert guidance, and a genuine passion for the craft — that’s the Deep Roots Rifle Co difference.