I can only remember this ever being a drop from Dun Garok Riflemen, and farmed it numerous times for alts.
But when I tried no luck, checked aowow and it said it was a world drop. But every comment in aowow presumes it to be dropped by the Dun Garok riflemen...
Wowwiki, thottbot, aowow (comments), my memory all indicate this shouldn't be a world drop (which is tough titty for alliance...).
But was there a time in vanilla (out side of my experience) when it *was* a world drop?
Or is this just broke private vanilla servers borrowing each others incorrect data and perpetuating an unblizzlike loot table...?