I dont use equipment or secondary's. I like just focusing on aiming/gun kills so. I also hardly ever stop running unless I am taking an objective so quickdraw/dexterity are must haves for me.
FAL + Primary gunfighter Target Finder Stock Quickdraw
Flak Jacket Toughness Dexterity + Tac Mask
If you run alot, you should use Ex Con and/or Lightweight
I used to run both of those all the time..and I still use Ex Con when playing kill confirmed. But on objective modes Flak jacket is way more useful than moving a little faster. And tac mask is more useful than being able to run for an extra couple seconds.