ICS are firing sub 340 fps. With an M120Spring installed and minimum 9.6V 1400mah battery you'll get yourself to sub-400fps with no problem.
G&G, is a pretty consistent 320-330 fps.
Originally Posted by aznpos531
not sure about the fps out of the box...350 sounds about right. someone confirm/correct.
put in a stronger spring = higher fps
ditto weaker spring = lower fps