A torsion spring similar to ones used on Nerf blasters.

A torsion spring is a spring variant. It is mainly used in Nerf Vortex disc blasters as well as RIVAL blasters and is the force behind the firing mechanism.


Unlike a regular spring, a torsion spring is powered by "torsion", or twisting power. When the blaster is primed, the spring is twisted around in a spiral or coil. Its energy is released when the spring untwists, and does not rely on air seals or a plunger. 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 firing trigger is pulled, the spring is released and snaps forward, flinging the XLR Disc or High-Impact Round out of the barrel.


Torsion springs were first used on the 2011 Vortex line.

Torsion springs were later used for three blasters in the 2014 Zombie Strike line, the second line to do so not counting the Multishot Madness or Light It Up sub-series.

Torsion springs were revisited again in RIVAL blasters, however, these torsion springs are used in addition to a direct plunger.

Blasters with torsion springs