Auto Turret is a Custom Block behavior, currently only available through the Console Command 'setname autoturret.' This will override the default Auto Turret, and spawn as a special Doodad on top of an Auto Turret Base. This doodad will then fire upon nearby Zombies. More turrets will be added in later patches for different purposes.
Notes:
Client players are unable to place down or delete Auto Turrets.
It takes 5 seconds for a turret to spawn after being placed.