you will need;
- laser pen
- electrical tape
- battery (9v)
- 'push to make' switch
- insulated wire
Step 1: Get your pen and crack it open!
im not sure how i did it but its not too hard. if all else fails just grind into it.
Step 2: Re-wire.
get your other components and re wire it. there is a little piece of gray metal on the top of the pen, this acts as the contact for the battery you will need to attach a wire here and a wire to the spring. after that attach the battery to your wires via switch and test it out.
Step 3: Go shootin'
tape it all up good and proper, taping down the switch on the pen to complete the circuit (your using your own switch now) and attach it to your weapon! good luck, see you in the forest (yes ill see you.....)