Cm901 with kick and a silencer. (gold camo)
ACR with silencer and red dot. (gold camo)
Scar with silencer and red dot. (gold camo)
I feel like I suck with the FAD but I'm real close to having gold camo for it. I hate using it though. It's like the bastard child of an assault rifle and sub machine gun. It doesn't have the range to compete with assault rifles or snipers, and a fire rate that can't quite compete with the submachine guns. It kind of sucks.
Every person to his own. Heck, when I was trying out the AK-47, it felt like a peashooter to me. Not because of the damage, though - it was because of the muffled sound and slower rate of fire which made it seem "weak" to me.
In fact, that reminds me...has anyone else noticed that the knifing sound while holding the AK-47 is different?
M4A1 all the way because it's great for everything it has less recoil then the ACR and the fire rate is higher then every Assault Rifle except the FAD if the M4A1 had anymore damage there would be threads calling it "overpowered".