It was made around V7 and V8, and basically, when clicked with the item on hand, you spawned a mouse-aimed rocket in front of you, and you got to aim it at any target you pleased.
I'm not sure if Kaje made it [Possibly Zoneark or Muffinmix, i'm not sure, it's been a while]
It was fun to mess around with, but it some cases overpowered.