Step 1: Parts
-chop saw (or hand tools)
-coping saw (hand tool)
-cable staples (those thinges that are like staples that go on cable
-long bolt with nut on the end
Step 2: The Stock, and the Guide
To make the guide I used 3 cable staples centered in the middle of the stock 1", 2", and 5" mark from the front of the stock.
This is mine:
Step 3: The Trigger Mechanism
To place the trigger mechanism, assemble it by placing the trigger between the two supports and threading the bolt through the two supports and the trigger. Place the supports close enough to the notch, and high enough on the stock in order to allow the trigger to pivot freely, with the pointed end of the trigger resting in the bottom of the notch. mark the location of the supports with a pencil, then drill through the existing holes in the supports into the stock. attach the supports on the stock with screws
I wanted to prevent the trigger from releasing accidentally (and potentially hurting my older brother =) LOL), so I wrapped two long rubber bands around the front of the trigger supports to the back end of the stock. This holds the trigger down until I press down on the end.
Step 4: The Arm
Drill a small hole near each end of the arm, where you will insert the small eye screws. Insert the stock into the arm so the top edge of the arm is flush with the top of the stock. I wanted a sturdy crossbow so I drilled two holes in the front edge of the arm and into the stock so I could screw the two pieces together, but you could use nails instead.
Tie a length of sports rubber between the two eye screws and adjust for the proper tension.
Step 5: Shooting
Tips for shooting
If the back end of the skewer is too close to the notch, the sports rubber will go up under the skewer, and if the skewer is too far forward, the sports rubber might snap too high and miss it.
Keep the crossbow level otherwise the skewer will slide one way or the other.
Don't point it at older brothers (or anyone else), or dry wall that you don't want holes in.