The combination I found to work the best for me
FAL-OSW w/ grip, select fire, and target finder (primary gunfighter wildcard)
Perk 1: blind eye (because those hunter killers get really annoying)
Perk 2: cold blooded (so others using target finder don't have the advantage)
Perk 3: engineer (cause bouncing bettys and shock charges are annoying)
Score streak: care package, sentry gun, stealth chopper
ETA: with the engineer perk, when I get an enemies crappy UAV in a care package, I love to booby trap them suckas. Nothing like seeing those points come up on screen when an unsuspecting victim falls for it.
This post was edited on 11/30 at 12:59 pm