How to Make a Pen Gun - Version 1 [HD]
http://uselesshowto.blogspot.com/ ::: This simple pen gun can travel up to 70 feet if made with the right elastics. You'll need a pen with ends that you can unscrew and two elastics. The stronger the elastic, the further your pen gun will shoot and the stronger it will be. Do not shoot this at people as it will hurt.