M808B2 Sun Devil
From Halopedia, the Halo wiki
The Sun Devil is built on a slightly modified Scorpion tank hull, and uses a full-rotation turret fitted with four twin-linked 40mm autocannons.[Note 1] The Sun Devil's threat tracking and targeting systems make it extremely effective at attacking Covenant aircraft such as the Banshee.
While ostensibly an anti-aircraft vehicle, the Sun Devil was used in anti-personnel role throughout the insurrection years, and proved to be very effective in clearing Covenant light infantry from contested points during the Human-Covenant War.
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