Auto Turrets

Summary
Auto Turrets are a weapon used by Auto 5, Auto 3, Auto Gunners, and Auto Trappers in Diep.io. They are gray circles with barrels on them, attached to or on top of a tank that fire at nearby targets automatically without needing player input. If attached to the side of a tank, only half of the circle beneath the barrel can be seen.

Technical

 * Auto Turrets will automatically fire at nearby targets without needing to be controlled.
 * Auto Turrets can be controlled if chosen so, however. Players can control the Auto Turret closest to their mouse (if more than one exists), by left-clicking or having Auto Fire turned on.
 * Multiple turrets can be controlled if both are close enough to the mouse.
 * Auto Turrets on the Auto Gunner and Auto Trapper cannot be controlled and will not attack Polygons or Dominators.
 * Auto Turrets fire Bullets slightly smaller than that of other tanks.
 * They have unnaturally high Bullet Penetration for their size, but move pretty slowly.Auto Gunner.png with its AI Turret]]
 * Auto Turrets can only turn their barrels a certain total angle.
 * This is why you take control of different turrets as you move your cursor around the tank.
 * Should an object leave their angle range, then the next barrel will take over. Once again, this is only if there is more than one barrel.
 * Auto Turrets on the Auto Gunner and Auto Trapper is exempt from this angle rule, and can shoot in any direction it pleases.

Users

 * Auto 3: Has three evenly spaced Auto Turrets attached to the tank.
 * Auto 5: Has five evenly spaced Auto Turrets attached to the tank.
 * Auto Gunner: Has one AI Auto Turret on top of the tank. However, it has four controllable Gunner barrels too.
 * Auto Trapper: Is a Trapper with one of these on top of it, like the Auto Gunner.

Trivia

 * Auto Turrets were first added through the Auto Gunner on August 1, 2016.
 * The next day, the Auto 3 and Auto 5 were added.
 * On August 15th, the Auto Trapper was added.
 * The fact that auto turrets are partially blocked by the tank in auto 3 and 5 may suggest that diep.io tanks are in fact, 3D.