Well a closed bolt gun has the bolt in the forward position when it is cocked, when it is fired it goes back then forward where it rests.
You would want to either mod it for some kind of pneumatic pump similar to an osiris autococker. You would need an electronic solenoid, a timmy ram (should fit a modern spyder), a lpr to act as the resevoir for the solenoids.
http://www.airsoldier.com/solenoids/index.shtml has some nice parts.
The dragun one kit is a great starter set for a tinkerer, but its expensive. I have one, it has a ram, grip frame, lpr, inline regulator, vertical asa, dropforward(that is too short), and tank asa.