So I just picked up an ICS PAR MK3 (Really nice gun, have to say) and it should fire 420FPS/.2g, which is of course higher than any field around here allows for an AEG. So I need to bring it down to 390-400FPS but because my last gun fires in the 360FPS range with .2s I never had to bother.
Anyway, any help is appreciated. I'd like to get to fire this thing in a game because I've been drooling over it for a while now!