Electric Airsoft Ammo Box
Third Step - Electronics
AmmoBox has one remote controled button. It works simply: push the button to start shooting.
User can switch on only solenoid, or only motor unit. Also device has a master switch to disconnect battery and avoid power consumption.

Ammo Box Electronics.

Ammo Box Electronics - schematic diagram.

Ammo Box Electronics - Master Control Unit - schematic diagram.
Two batteries are independent. One trigger supports two N-Channel Mosfets, so it is possible to control two batteries by one trigger.