Gravity Platform
From Halopedia, the Halo wiki
Overview
Gravity Platforms are used as an easy elevated, covered, and set up position by Covenant ground forces. Often used as sniping points for Jackal Snipers, they are also used as Plasma Turret vantage points.
Offering three points of cover, and an elevated position with only one point of entry, their biggest weakness is that they are destructable.
Appearances
Gravity Platforms have appeared since Halo 2, and were first used as turret platforms in Halo 3.