So I've always thought I was better with ARs as opposed to SMGs and it turns out after crunching the numbers, I was right.
With ARs I am 1.32 and with SMGs I am 1.202
My highest was the with the FAL at 1.66 (M8A1 was 2nd at 1.63) and lowest was the SMR 0.71, however, I haven't really used the SMR that much.
I'm not too surprised at the difference in the weapon groups as I am not nearly the rusher half of CoD is. I like to hang back a little and try to pick off people while slowly moving up. Not rushing exactly, but forcing people to make mistakes. Though, with the frequent (Hello Hijacked!) spawn flips, I often find myself in the wrong positions, lulz.
Though, I do know this, I can clear house on Hijacked with a SMG, probably the only consistency I have on a map.
Anyone look at their stats and see a discrepancy in weapon classes? I don't use the others frequently enough to care to crunch numbers.