Im doing the same, got Diamond SMG's so kinda bored of them now.
Im running the AN-94 with Quickdraw.
Perks i use 5, lol, Blind Eye (on every class due to HK's) and either Ghost or Hardline.
Toughness in perk 2
And Engineer and Dexterity in perk 3 slot.
And throw a semtex in and im done!
Seems to be working for me so far!
Gun: any of your choices 1
Attatchements: Quick draw(or stock), Fast mags 3
Perk 1: Light weight 4
Perk 2: Toughness 5
Perk 3 Dexterity, Tactical Mask 8
Lethal: Bouncing betty or semtex
Tactical: Emp nade
I run something similar to this because it gives you mobility similar to what you are used to, fast ads if you come into CQC but stability over long range. Makes sure you don't get caught with your pants down running into an smg but still have plenty of range.
the BB watches your back and the emp nade can be used to check buildings and weed out campers not to mention the sheer amount of exp that you get for destroying equipment.