Thats what I've always wished was part of paintball... a larger variety of guns. I don't really understand that statement about some full autos shooting under 250 FPS, i currently have a PCS US5 and it fires the same speed on semi as full, it really makes no difference.
There ARE a few specialty guns out there (aka RAP4) but they are few and far between.
as far as sniping goes, in real paintball it can be defined as those who hide and wait for an opportunity, technically you could have paintball "snipers" using full auto guns firing at 30BPS.
but as far as the traditional definition of snipers goes, in real paintball they do exist, but it really does not work very well. as the paint only fires so far without losing accuracy.
However this IS a game, and you have already lost all semblance of realism (average speed of 50 kmh!) so high powered sniper guns. however unrealistic, could exist given you can increase the speed of the balls drastically.
I'm still against it all the same, in DP2 sniping would just not work