K'NEX Derringer

small, simple, and very powerful for it's size.

Step 1: What You Need

Step 2: Step One

Step 3: Step Two

Step 4: Step Three

Step 5: Step Four

Step 6: Rubber Band and Cocking

Step 7: Firing

put a tiny green rod in the front.
hold by white rod and push side of barrel down with thumb.