This is a school warfare weapon but don't shoot it At school

Step 1: Taking Apart the Pen

For this you will need a pen like the one in the picture.next you will need a rubber band.now you have all the parts you need

Step 2: The Body

Using the cover part at the front of the pen later make a hole in the middle the body tube with any sharp object but big enough so that the cover part of the pen will go in.if it won't stay in use hot glue to keep it in place.

Step 3: The Firing Cord

This is when you will cut two semi-deep notches in the side so you can fit in the rubber band.once you have finished putting the rubber band in place you are almost finished