If you were in Guild that could get this you would have Kara On farm status so you probably would have the chance to get Wolfslayer Sniper Rifle. You probably would never pull seeing as hunters have misdirection giving you more aggro with in a few seconds than you could do on your own.
Kara on Farm? u'd have to havwe a hell of a lot more then JUST kara! Mount Hyjal is the second hardest in-game raid overall, and Archimonde is harder then some bosses in BT! so dont think if u have kara on farm u can get this, u prolly need most of the others on farm. SSC and the Eye will probably be needed on farm for this baby!