I think my original thoughts about this project came from looking at autocockers. I just decided that it would be really cool to have an air ram actuated electrically controlled mag. I used a Z-grip because it gave me the most room in the back to work with. All the componentsI used, I got from work. I started with a bafricated banner photoeye that looks for a bolt that I added to the back of the trigger. It opens an electric solenoid Mac valve which in turn sends low pressure air from a seperate reg. to the air ram. I needed at least 22-30volts DC to operate the electrics. I thought about a seperate battery pack, but couldn't find a good location. So I added a battery in series to the hopper. Giving me 27volts from the hopper but still allowing it to work normally.