A 75mm Gatling gun, drum-and-belt fed; mounted on a shield, which could be ejected at a moment’s notice when the heavy weapon ran out of ammo or became a burden in close combat. Made primarely for the Gouf Custom and Gouf Flight Type but could be used by other mobile suits. In 0096 a Geara Zulu was seen using one during an attack.
part 1
https://www.youtube.com/watch?v=IqW14xZiaIE