Cobalt Kinetics PRO Series 11.8" Upper Receiver Group

Cobalt Kinetics ships the PRO Series upper receiver group as a finished assembly. It pins to a standard AR pattern lower and needs no work at the bench beyond that.

At 11.8" this is one of the longer configurations Cobalt Kinetics catalogues in the PRO Series. The distributor passes that figure through as the SKU designation without stating what it measures, so the listing repeats it as given. Chambering does not appear anywhere in the distributor record, so confirm the caliber marking before matching a bolt group to it.