Would be an interesting sniper rifle, silent and deadly also no flash.
Wrong, It wont be silent, it would be EXTREMELY loud since it breaks the sound barrier 10~20 times over, so you'd need a hell of a silencer, it might
still produce a flash too of electrons possibly some sparks flying from friction in the barrel.
It would a top-notch anti-material/armor weapon for sure, the FCS was going to have a EM gun like that but they scrapped the idea for something more
conventional...
On a less serious note, yeah the Gauss Rifles in Star Craft totally sucked, they couldn't even kill an alien in some primitive exoskelleton...lol
In Total Annihilation however, Gauss guns rocked...