Unlike a regular spring, a torsion spring is powered by "torsion", or twisting, power. The spring is twisted around in a spiral or coil. Its energy is released when the spring untwists. The torsion springs within a Vortex blaster are helical torsion springs
When a blaster with a torsion spring is primed, it tightens the coils of the spring. When the trigger is pulled, the spring is released and snaps forward, causing the internals to activate and fire an XLR disc.