So the first thing you want to do is cut off the back part like this.
Then you need to take your pump of choice like this.
Then connect your shot blast tank with your pump of choice with your tubing.
Your tank should look like this.
Then grab you barrel of choice my was a 20cm or 8 inch barrel.
Then dremal or gut out the inside like seen in these two pictures.
Your tank and pump set up should look like this.
Screw in a big screw so that the wire will be level like this.
Then put in your your set up and run the wire like this.
Your finished set up should look like this.
Close it up and your done everybody's happy
and heres a firing demo.