In order to make the turret move smooth and quickly, we need to make the gun lighter and less bulky. I started out with the Crossman R-71. I took off the rails from the side to make it lighter and I cut off the handle to make it mount easier to a piece of VEX metal, by doing so I also removed a lot of weight from the gun.
To control the gun from a microcontroller you have to use a special circuit. The following diagram lets you turn the gun on and off by using a digital port on any microcontroller.
In order to hook this circuit up you have to open up the airsoft gun and find the motor that fires the actual bullets.