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
This disambiguation page lists articles associated with the title Gas gun.
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