Riot gun
（重定向自Riot guns）
![A U.S. Marine holding an American model M-32 6-shot 40 mm launcher, which can be used as a grenade launcher or riot gun depending on the ammunition used.](/Images/godic/202502/07/M-32_Grenade_Launcher1451.jpg")
![Two rounds of Fiocchi 12 gauge rubber buckshot](/Images/godic/202502/07/Fiocchi_rubber_buckshot1451.jpg")
![Israeli Border Guard with a Federal M201-Z riot gas gun](/Images/godic/202502/07/Gas_gun1452.JPG")
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.