This is a picture instructable og how to make a very powerful softgun.
the softgun shoots 200 m/s+
SEE THIS LINK FOR A DEMONSTRATION http://www.youtube.com/user/sabladask?feature=mhum#p/a/u/0/ff4Q81E9f4w
Warning!!! I take no responsabilty for you, or your actions and pease, be safe! Never point it at something that can break or someone. be careful!
Step 1: This is how it works.
the drawing is not so good but hope you understand.
i drawed it in paint :P