This article describes a custom creation, custom theme, or other fan material, made by a Brickipedia contributor. It has never been, is not, and will not be officially released.
Its power comes from the rubber band looped around the front. When the chain pulls it back and lets go, it swings forward very fast and launches the "boulder".
- The original variant of the set had no wheels.
- The rubber band used for the catapult came with a LEGO set.