Summary

A launcher for business cards, playing cards and metro cards. Highly effective and dangerous.

Instructions

Laser cut the design into 3/16"-1/4" wood or acrylic. Wood seems to work best. You may have to adjust the drawing slightly for your material.
Attach the slotted top piece to the handle. You may want to use some glue, but it's not required.
Thread a rubber band through the two small slots and knot it
Wrap the rubber band around a business card at about a third of the way in
Pull the rubber band back so that it lines up with the pointed end of the gun
Make sure you don't point at anyone's eyes!
Let go of the rubber band to fire!