That's what I've pictured a railgun as, but faster projectiles and not a laser.
But I would LOVE to see the railgun dded to the game.
EDIT: Wait....I may be thinking of the Gauss cannon:mellow:
EDIT 2: No...what I'm thinking of is like a long laser-type projectile with an explosive impact with a VERY high speed....It would just be best to call me confused....