M8 Wolf Spider
From Halopedia, the Halo wiki
The M8 Automated Defense System (M8 ADS), nicknamed the Wolf Spider, was an automated defense turret manufactured by Misriah Armory and utilized by the UNSC on sites labelled important by the Office of Naval Intelligence. During the Fall of Reach, four Wolf Spiders were deployed around Dr. Catherine Halsey's lab at the Forerunner artifact beneath SWORD Base.
The Wolf Spider fires 12.7×99mm Armor-Piercing rounds, which are contained in a 10,000-round drum. To sight and calculate targets, an optic sensor is mounted under the barrel. As a networked array of mounted turrets, the Wolf Spiders need to be deployed on an overlapping field of fire to put their use into the best effect. They can attack both ground and air forces.
Multiple Wolf Spiders act as a single machine, sensing, tracking, and firing on targets. With overlapping fields of fire, they can easily eliminate said targets with their automatic fire. After being seriously damaged, the Wolf Spider trips a killswitch, which drops the weapon back into the pod and closes the hatch for protection, requiring a manual reactivation after they finished recharging. They could be linked to a heads-up display that would display their structural integrity.
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