The adjustable FPS on the M82 is also useless, since you can only adjust down from the field limit.
It doesn't shoot any farther or more accurately than a fully upgraded VSR-10, therefore is entirely useless.
And it's great that your P90 shoots as far as someone's VSR, so do some PTW's
But the trick is, can you shoot someone from 15 feet away and still maintain your stealth? Because I can. My rifle is dead silent. Ask Amos