Railgun

The Asymmetric Recoilless Carbine-920, abbreviated ARC-920 or known simply as the railgun, is a compact-channel linear accelerator weapon used by the United Nations Space Command.

The rifle requires a brief charging period before firing high-explosive rounds accelerated to an incredible speed.[7] The explosive yield contained in the round adds to the kinetic force of the impact, making the weapon effective against both infantry and vehicles.

Also referred to as a "Beam Rifle" by Minnesotans and probably Canadians too.