In current usage a riot gun or less-lethal launcher is a type of firearm that is used to fire ""non-lethal" or "less-lethal" ammunition for the purpose of suppressing riots. Less-lethal launchers may be special purpose firearms designed for riot control use, or standard firearms, usually shotguns and grenade launchers, adapted to riot control use with appropriate ammunition. The ammunition is most commonly found in 12 gauge (.729 inches) shotguns and 37mm and 40 mm (1.46 and 1.57 inches) grenade launchers.

During the battle of Ginze, Tokyo riot police used riot gun with tear gas to suppress Imperial Troops in order to capture them.

600px-Gate JSDF 01 Police (2)

Riot police officers fires tear gas with the riot gun in the anime


Police fires tear gas at the Imperial Troop with riot grenade launcher.