MP5 (decreased accuracy over longer ranges), MP7 (decreased accuracy over longer ranges), and M4A1 (increased recoil would be nice or maybe increased ads speed (it's all around performs way too well and needs to be lacking in some respect to be balanced)) - These guns clearly take no skill to use; if you use them you are well aware of that. I have high KD's on these guns.

Throw some minor to mild nerfs to the .357 and .50 in exchange for increased fire rate cap and bullet velocity buffs to all pistols.

I can't think of anything else that could do with changes except maybe reducing range on the lmgs and in exchange increasing their ADS speed.