The installation process is easy and straightforward. You just have to screw it onto the top of your gun using some screws and then you will be good to go. Steps: 1. Place the hopper on top of the paintball gun. 2. Insert the battery into the hopper.  3. Turn on the hopper and make sure it is working properly.  4. Tighten the hopper onto the paintball gun by turning clockwise. 5. Some loaders offer a toolless installation.