How to make a small pneumatic gun out of a pen. It can be pressurized over 100 psi and shoot small nails into wood. THIS IS DANGEROUS if you choose to make this I am in no way responsible if you injure your self shooting it or if it explodes while your pressurizing it.
For this project you will need a bic pen and another piece of tubing (I got mine from a mechanical pencil) that fits inside the front peice of the bic pen if you remove the ink cartrige. You will also need a Zebra mini mechanical pencil (got from staples) or an eraser that fits inside a bic pen and you can drill a hole through. You need a schrader valve (the ones used on bike tires), and a airsoft bb.