Cross Pistol or Mechanism of Crossbow

basically i made this to show how i made mechanism for crossbow

crossbows are legal in most countries.check out the laws on Wikipedia or Google before proceeding further.All i know its legal in India.also please write in comments below which countries have it legal.

Step 1: Making the Design

use compass and scale to create basic concept design and arrange the materials for it.

Step 2: Making It Real Part One-mechanism

copy the design onto the wood and first cut it with small hacksaw
then follow this video to see how to copy final art of design onto it (accuracy required)

then drill and sand it up.

Step 3: Making It Real Part Two-making the Body of the Crossbow

you'll need straight strips of wood
there are three layers of it so get three.
drill them accordingly
join with screws nails and glue as shown in images

Step 4: Making It Real Part Three-making the Pistol Grip

in last version i joined pistolgrip from bb gun this time i am going to use wood

Step 5: Fix a Bow or Rubberband Strip

pvc bow is the best but use rubberband made from tire if unavalable. 
fire it until its string breaks ones.
then replace the string

Step 6: Fin

congrats.you made a crossbow or something similar.
now go on a hunt or target practice.