KS-23

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

A variant of the KS-23 which fires a harpoon which is used to take down a Russian Mi-8 Transport Gunship can be found in Vorkuta.

This shotgun was created for riot control in Russian Gulags. The barrel was just a chopped down 23 mm anti aircraft barrel.

It fires a 6 gauge shell.

Trivia

 * if you switch weapons quickly while holding the KS-23, the player's hand will clip through the model of the shotgun.

This one of the two shotguns that are exclusive to Singleplayer, the other being Model 1887.