I used to really not like this gun, but lately I'm having a lot of sucess with the SCAR-L. Great iron sights, precision shooting with using Kick. I lose to many up close fights (when they inevitably happen) with an ACR; the SCAR has just enough of a better rate of fire to make a difference. Longer ranges, I'd want an ACR.
1)ACR-best gun in the game IMO because its an easy gun to use
2)G36C-monster at close-mid range
3)M4A1-great fire rate and I seem to do good with the iron sights
i used the acr when things get "ugly" or when playing against good people.