Screw silencers, TAR + red dot w/ Stopping Power is where it's at. Just got my Blue Tiger camo for it, and have nearly 700 kills with it... all in this level of prestige. And I'm only level 40.
However, I just unlocked the M16 and, well... I think the TAR might be taking a back seat. 15 kills with it in the first match I used it in (for me, 15 kills is pretty damn good), and three matches later I went 28-7* on Afghan with it
(*care packages ftw - the Harrier Airstrike I got in one ripped people apart, and I had a triple kill with my Predator; I use a 3-4-5 KS setup as I'm not good enough to get anything higher than those lol)