The Cobalt Kinetics CK-Pro Receiver Set in CK Green Cerakote is a matched AR-15 upper and lower receiver set built for shooters who want a precision-machined foundation with a distinctive finish (brand part no. CK-PRO-SET-675-CKG). Cobalt Kinetics machines the upper and lower from 7075 T6 aluminum and the handguard from 6061 aluminum, then secures the handguard to the upper with 8 TORX screws for a solid, non-rotating interface instead of a single clamp point. A reverse-threaded barrel nut seats the barrel evenly with more thread engagement than a traditional receiver extension, letting the barrel deliver its full accuracy potential. The set ships complete with the ejection port cover, forward assist, and all necessary mounting hardware, and it is built to accept barrels from 7.5 to 16 inches across multiple AR-15 calibers.

Key Specifications

• Caliber Compatibility: a multi-caliber AR-15 platform that accepts a barrel in the builder’s caliber of choice.
• Material: 7075 T6 aluminum upper and lower, 6061 aluminum handguard.
• Included Components: a matched upper, lower, handguard, ejection port cover, forward assist, and mounting hardware.
• Barrel Nut: a reverse-threaded design that seats the barrel evenly for maximum thread engagement and accuracy potential.
• Handguard Attachment: 8 TORX screws creating a non-rotating, solid handguard-to-upper interface.
• Finish: CK Green Cerakote.
• Compatible Barrel Lengths: 7.5 to 16 inches.

Frequently Asked Questions

Does this include a barrel or bolt carrier group? No, this is a matched receiver set (upper, lower, and handguard); barrel and internals are sold separately.

Is it caliber-specific? No, it is a multi-caliber AR-15 receiver set built to accept a barrel in the builder’s caliber of choice.

Is this the same set as Cobalt Kinetics’ FDE version? It shares the same machining and construction; this listing is finished in CK Green Cerakote instead of FDE.

Buy the Cobalt Kinetics CK-Pro Receiver Set, CK Green

The same precision-machined barrel nut and non-rotating handguard interface as Cobalt Kinetics’ other CK-Pro sets, now in a distinctive CK Green finish. See more of Cobalt Kinetics’ AR lower parts kits and order yours from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.