Cobalt Kinetics PRO Series 6.75" Upper Receiver Group

This is the PRO Series upper receiver group from Cobalt Kinetics, supplied as an assembled group rather than a bare receiver. It mates to a standard AR pattern lower, so fitting it means dropping it on and closing the takedown pins.

The PRO Series runs across several length configurations and this is the 6.75" one, the shortest in the family. That number is how Cobalt Kinetics separates the SKUs in this line. Beyond the length designation the distributor listing carries no chambering, so check the caliber marking on the receiver before pairing it with a lower and a bolt group.