For close-medium range the Tar is decent but it recoils too much to be effective at long range...I mean it's terrible. I was in the center building on Derailed shooting out a window with the Tar and it took me almost 2 magazines to kill the guy I hit him so infrequently. That was with slow burst fire too.
Tar is fantastic in 3rd person play though.
It's great for Close Quarters, but I can usually catch people at a decent range with it as well. It only takes a few burst to kill someone with it.
I was in a match once, ran out of ammo, picked up a Scar, and was staring down a guy from a Window at subbase. He was right below me and I was blasting the guy with it, the shots were flying all over the place and I couldn't even kill him with a full clip. He turned around and killed me...messed up my streak. I was better off jumping out the window with my pump shotty or even a knife attempt.