These stuff objects will generate an AI of the given type. Each type has unique Health, Accuracy, Melee Damage, and Speed. Once an AI has been placed, you can use their context menu to alter their weapon, inventory, and patrol path. Patrol path wait times at each point can be set in the AI Settings modal, found in an AI's context menu.
MilitaryMech is a special boss-type AI. This AI does not move, and comes equipped with a rocket launcher and turret attachment. These attachments will attempt to target different players whenever possible, making it a great defensive mech. None of this AI's special settings will have any effect, except for its inventory value, which will be dropped when destoryed.