The KS-23 is a pump-action shotgun which makes an appearance solely in the campaign of Call of Duty: Black Ops. It is unavailable for use in multiplayer.

A harpoon firing modification on the KS-23 which is used to take down a Russian Mi-8 'Hip Gunship can be found in Vorkuta. The gun appears very often throughout the campaign as one of the main shotguns of both the SOG and the Red Army