Warning: This can be used for target practice, but please don't shoot at living things or people. I am not responsible for any injuries or damages caused by this instructable. Also, don't point this towards your face when its loaded. Finally, sorry for all of the safety warnings I put on this. Wear glasses, and all that, I don't want to be sued.
Step 1: Gather Materials
3 BIC Pens (the cap has to be slide on, not screw on)
Tape (scotch tape)
Pen ink container (these are in the BIC pens, so you are fine)
3 springs (once again, in the pens)
Step 2: Prepare Your Materials
2: Take out the ink container
3: Optional: switch ink container for a metal one. Some BIC pens have metal containers. These last longer and are stronger.
Step 3: Add Springs
Chose the best quality ink container, and put all 3 springs on.
Connect the springs by twisting them together.
After connecting the springs, tape one spring to the ink container, on the end of the spring. (shown in picture 2)
Step 4: Load the Pen
2) Press the ink container inward and press the button at the same time
3) Keep pressing on the ink container, and put the cap on
4) Press the cap on so it will stay on the pen without holding it
Step 5: Firing and Reloading
2) To reload, get the cap, or another cap from the other 2 pens you disected. Put the cap on the ink container, and press the button. The cap should press onto the pen, and stay there. Warning: Do not look directly at the cap, it is possible it will fly off and hit you in the face or eye. Basically, use the same rules with this pen launcher as you would with an airsoft gun or paintball gun.