Cobalt Kinetics CK-Pro URG 11.8" Aluminum Black Cerakote Stripped Upper Receiver

The Cobalt Kinetics CK-Pro URG (Upper Receiver Group) is a stripped upper receiver machined from 7075-T6 billet aluminum and finished in Black Cerakote. Part of the CK-Pro line of upper receiver groups, this stripped upper gives builders the same billet receiver platform featured on Cobalt Kinetics' complete rifles and is intended for end users who want to build or upgrade their AR-15 with a precision-machined foundation.

This version carries the 11.8" rail length designation, providing a handguard-friendly platform for a variety of barrel and muzzle configurations. The upper ships stripped only - no barrel, bolt carrier group, or charging handle is included - allowing the builder to select those components to match their preferred caliber, twist rate, and ballistic setup. It follows the standard AR-15 upper architecture and is compatible with common AR-15 chamberings such as 5.56x45mm NATO and .300 Blackout when paired with the appropriate barrel and bolt.

The receiver is precision-machined from 7075-T6 billet aluminum and coated in a durable Black Cerakote finish for corrosion and wear resistance. Cobalt Kinetics backs the CK-Pro line with a lifetime warranty, reflecting the company's confidence in the billet construction and finish quality. Sold as a standalone stripped component, this upper is an AR-15 part and does not constitute a complete firearm.