Plasma
From Halopedia, the Halo wiki
Template:Weapon Superheated Plasma is a primary and most common form of ammunition for the Covenant. It can burn through a Marine's ballistic armor and are more lethal to the human counterparts: bullets and rounds. In fact, one shot of a plasma bolt, in reality, is enough to burn off an entire finger. Superheated plasma is found on mostly all Covenant weapons, like Plasma Rifles, Plasma Pistols, and many others. This ammotype can be found in vehicles, namely Ghosts, on a Spectre, on Banshees, Wraiths, and many starships. They are used on turrets, as well. A Plasma Turret, Shade, and Plasma Cannons are just some of the heavy artillery using plasma.
