Railgun -

A railgun consists of three primary components: a massive power source, two parallel metal rails, and a sliding armature that holds the projectile.

A railgun is a linear motor device that uses electromagnetic force to launch projectiles at hypersonic speeds. Unlike traditional cannons that rely on chemical propellants (gunpowder), a railgun uses electricity to generate a massive magnetic field that accelerates a conductive slug. How It Works Railgun