The Cobalt Kinetics CK-Pro upper receiver group (MPN CKPROURG55616BBLK) is a complete AR-15 upper assembly chambered in 5.56 NATO with a 16-inch barrel.

Key Specifications

• Cobalt Kinetics CK-Pro complete upper receiver group
• Chambered in 5.56 NATO/.223 Remington
• 16-inch barrel length
• Aluminum receiver construction
• Black Cerakote finish
• Built and test-fired by gunsmith staff before shipping
• Designed to upgrade existing AR builds to CK-Pro performance
• Expertly assembled by hand

Frequently Asked Questions

Does this include a lower receiver?
No, this is a complete upper assembly only; it ships without a lower receiver or fire control group.

What caliber is this upper chambered in?
5.56 NATO/.223 Remington.

Buy the Cobalt Kinetics CK-Pro 16in 5.56 Complete Upper

Drop a gunsmith-built 5.56 upper onto your rifle build with this assembly from Cobalt Kinetics. Order from a Lubbock, TX gun shop in our AR-15 uppers lineup.