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Vortex gun fires rings of air that could deliver pepper spray, tear gas
Vortex Ring Gun Shoots Tear Gas & Pepper Spray
Crowd control: Ohio company's vortex gun may be the answer to non-lethal crowd control - TomoNews
Swirling Smoke Rings: Vortexes in Action
Vortex ring gun | Wikipedia audio article
The howl of the vortex cannon
Vortex gun
Fun with gas vortexes!!!
Smoke Vortex Cannons
Vortex gun smoke rings
Making a biggest vortex cannon | Doing extreme experiment by filling LPG in vortex cannon
Vortex on People
