Banned because while snipers certainly are skilled, I was referring to "wussy" in the sense of sheer brute strength.
One other problem I see with the rotary railgun is that once you've got the ball moving fast enough to punch through a tank, you have to make it go around a 90 degree bend to get into the shoulder tube. Plus, at the end she has to carry the thing and fire it from inside an exosuit, and I have no idea how or where it would fit.