If i have to go raw gun i would choose......
Smg
Pdw even after the nerf just seems like the best imo. Its still well balanced among the smgs but has a huge clip.
Recently ive been using the chicken and its really growing on me as i like single shot and burst guns.
Ar
Im an FAL fan always was but since the nerf its not as good.
I like burst/ single shot guns in this order FAL. M8a1 smr/swat
As far as automatic the scar has been great since the 3 bullet all range nerf
And th an94 is great too. Mtar has a small clip which makes it not so good.
I miss playing when ARs were the best guns
Lmgs
Never liked them and still dont. Wouldnt even have an opinion have never used one of them.
Sniper
Dsr by far my favorite. Bolt action QS is the only way to go. That semi BS is for fanboys with no skill. Spray n pray

Shotgun
The remington mcs. Then the ksg. But that slug distance is rediculous. But hey.
Guns like the m1216 auto is BS. Imo. Mw2 aa-12 all over again.
Scavenger. Clamore/betty myself in a building m12 you never make it in camper special