famas to famas g2 is pointless
you won't get the suppressor, you won't get the scope automatically
there is no fire rate change from famas to g2
dmg doesn't change
the only other difference is accuracy and someone said crossmodding doesn't change that
now if you do famas to mac10 like I did that would be at least mildy useful
(although without a norecoil/nospread it will be hard to control)