UPDATE

This is how the monster is currently taped on.

This is a quick page, just showing off how the motor for the full-auto works when not attached to the trigger assembly.

Picture one: The entire motor/gearbox/piston assembly. This shot just shows how everything fits together.

Picture 2: This is the "gearbox." A standard electric motor transfers power to the larger gear, which spins a flywheel, which moves a piston.

Picture 3: Here's the flywheel. As the gear beneath it spins, the flywheel moves around, moving the piston arm with it.

Picture 4: Piston is retracted at this point. It shouldn't be touching the trigger at this point, or at least not applying any pressure.

Picture 5: Piston is out, by this time it should have tripped the sear and fired the gun.

Please note that this version sets up so that the trigger cannot be fired with your finger, it will be full-auto only.