Gauss Rifle

A Gauss Gun or Gauss Rifle (in reference to Carl Friedrich Gauss, who formulated mathematical descriptions of the magnetic effect used by magnetic accelerators) is a type of projectile accelerator consisting of one or more coils used as electromagnets in the configuration of a linear motor that accelerate a ferromagnetic or conducting projectile to high velocity. In almost all Gauss gun configurations, the coils and the gun barrel are arranged on a common axis.

While still called Gauss Guns or Rifles, modern arms use gravitic fields and forces to accelerate the projectile to near light speed of 0.99c.