A railgun is a weapon that uses electromagnetic force to launch high velocity projectiles Railgun or rail gun may also refer to: Railway gun, a large caliber artillery piece mounted on a railcar for rail mobility Benchrest rifle, also known as a rail gun, a type of rifle that is built into a machine rest A Certain Scientific Railgun, a manga and anime series Mikoto Misaka, also known as "Railgun", protagonist of the series and a character in the A Certain Magical Index series of light novels.