We will keep the FPS rules simple. Try not to keep it under 375 with .25s (I think thats around 400-415 with .20s). Generally, we like to keep it in the 300's. I do know that the Echo 1 SCAR shoots above that out of the box. So if anyone uses that its ok, obviously. For snipers (which I do not know if we have any going) keep it around 450. They also cannot engage close targets, they can use a side arm, however.
But hey, its the night before. Do not sweat it, trust me. If your gun is stock out of the box, then it will be fine FOR SURE. Even, if there are minor upgades (like springs etc..) it will be fine.
Bottom line- bring your weapon and use it,
Later,
Joe