Hyperflux Cannon

As the Hyperflux Cannon charges up, its spinning vortex collects energy straight from the cosmos, with the vortex generating a heat shield that protects its user against incoming fire. Worse yet, when the cannon actually fires, its blast can create miniature black holes that completely destroy whatever target is unfortunate enough to be hit by it. A terrifyingly powerful weapon, it is of course only logical that a Decepticon scientist like Shockwave would have the Hyperflux Cannon as his left forearm.

History
Shockwave's primary weapon was his Hyperflux Cannon.