What you will need: 17 inch of hard wood, Bendable wood doesn't matter about the length, 19 inch of sting at first I used wire it was okay but now I use paracord, A handle I used a metal rod that fit into the hole in the wood, 6 inch of bendable thin metal, duct tape if you want it, drill if you have one but if not you can find a big screw and hammer it into the hard wood and that will be your handle.
Step 1: Handle
Step 2: Main Limb (bendable Wood)
Step 3: String
Step 4: Trigger
Basically you want part of the metal straight, the middle you want bent around the hard wood, and the top you want 2 dents this will provide safety as when you are not going to fire you should have the string on the lower dent and we you are going to fire you want it on the upper dent to fire you need to release pressure and the string will slide off the trigger.
I hope you have enjoyed and tell or ask me in the comments anything about the crossbow.
I would love some suggestions on what to make next :)
make sure you check out my youtube for more awesome stuff -http://www.youtube.com/user/ARCTICLEADER