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)