Cobalt Kinetics PRO Series 15.5" Upper Receiver Group

This is the PRO Series upper receiver group from Cobalt Kinetics, sold assembled rather than as a bare receiver. It mounts on a standard AR pattern lower using the normal takedown pins.

This is the longest configuration in the PRO Series group, listed at 15.5". Note that the part number reads 16 while the distributor's own title reads 15.5", and the title figure is the one used here. Chambering is not stated anywhere in the distributor record, so confirm the caliber marking on the receiver before pairing it with a bolt group.