Shutax, I'm not familiar with wingun models I've never actually bought them, but if there's a mag for it that will run on green gas or even propane, it will shoot at a lower fps than co2. Fps would go in this order co2>propane>greengas. No blowback makes a gun extremely efficient and allows for much higher fps. Basically treat the fps of any gun as whatever category it falls in for an aeg. But chrono it first, it may fire anywhere in the range of 350-500fps. I'd recommend we revise/clarify the rules a bit to be a little more clear. For example fps limits are with 0.2g bbs and will decrease accordingly as bb weight goes up. Secondly there is no med limit for the maximum aeg. I'd assume it would go something like this:
(copied, pasted & revised a little)
FPS LIMITS:
Preferred AEG - up to 350 FPS with .20g BBs
Maximum AEG - 350-460 FPS with .20g BBs (MED - 20ft)
BOLT ACTION/(or SEMI action only, mag capacity no greater than 50 rounds) snipers - 460-500 FPS with .2g BB's (MED 100ft)
20ft is almost nothing, the length of a small room perhaps, but it's enough distance to keep people back just a little bit and from shooting someone at point blank with a 400fps+ gun. We have the safety kill rule, so it's going to be rare that anyone engages someone at under 20ft in the first place. Adding the MED will make people more likely to take advantage of the safety kill rule.
As for sniper weapons, it's almost no advantage over an aeg with such a minimal difference in fps. It's quite difficult to aim at someone through a scope at close range. Because it's such a minimal to no advantage over an aeg, I'd recommend adding something like:
BOLT ACTION/(or SEMI action only, mag capacity no greater than 50 rounds) snipers - 500-550(or 600) FPS with .2g BB's (MED 100ft) **SIDEARM REQUIRED**
Players in this class that engage with the rifle instead of the sidearm at a distance of less than 100ft will no longer be allowed to use their rifle in future games until the fps is lowered to under 500. Players in this class can not use the safety kill rule on another player unless wielding the sidearm.
That way it would cover a lot of the l96s that already shoot around 530-550 from just a simple upgrade kit. It would even cover any semi shot gas pistols shooting in that range. 550-600fps may seem like a lot, but I'd probably rather get shot by that at 100ft+ than sprayed at point blank with a 350fps 
Not to mention there will probably be nobody over 550 unless they can afford the $500-$1000 worth of upgrades to keep it from breaking.
