title: Gas gun
text: # Gas gun
  
  A gas gun may refer to:
  
  * A projectile-firing gun powered by compressed air:
     * Air gun
     * Airsoft gun (in particular a gas blowback airsoft gun)
  * Devices described as pneumatic cannons:
     * Dynamite gun
     * Holman Projector
     * M61 Vulcan (also hydraulically operated)
     * Potato cannon
  * Certain non-lethal or less-lethal firearms:
     * Gas pistol
     * Riot gun, especially when loaded with CS gas grenades
     * Vortex ring gun
  * A gun that fires a stream of gas. This can be for these purposes among others:
     * To generate a loud noise as a bird scarer
     * For astronaut propulsion in outer space
     * Light-gas gun, a velocity-generating device used in physics experiments
  * A gas-operated firearm mechanism
  