This is not a concept, but a prototype of a vortex cannon that capable of generating extreme blast of air to blow any assailants off their feet. The Vortex Cannon is capable of shooting a ring shaped of air that formed through a rapid condensation of moving gas at a speed of over 200 miles per hour.

Vortex-Cannon

Let’s roll the video to view how the Vortex Cannon works…

No info if this type of Vortex Canon will be mass produced or commercialized.

[ Source: Geek ]