Completly Concelable Pen Gun (no Rubberbands)

well this Instructable is a little something I made while I was looking at other pen guns and realized that all of them were rubberband or balloon powered so I thought to myself hmmmm and then it came to my mind that the world needed a better "spy" pen gun. so the next day at school after the test was done it was time to invent

Step 1: Materials

Hot glue gun
Bic pen
screw driver
small screw (has to fit in ink tube)
pliers (optinal for better grip)

Step 2: The Gun

just follow the steps