FAMAS, it may be french, but its great. (not that I'm racist against the french,they're not known for making good weapons, like Germany, Russia or Switzerland)
It fits most situations, good in medium distance engagements, decent at CQC, good rate of fire, ok damage (kills in 4 shots), low recoil (well maybe not as low as the M14 but ,lower than the GE6E or AK)
Only down sides are no built in scope like the GE6E and no burst mode like the K2.
(However the EU combat arms FAMAS does have burst mode)
Oh and it just sounds great too.
I also like the K2, for the same reasons, however the FAMAS is better at CQC and I play a lot of Junk flea and Sand hog.