Technology & Combat Characteristics
The GM Guard Custom is a minor change variation of the GM Sniper Custom created during the final stages of the One Year War. It was developed primarily to defend allied units, and to guard the fleet as well as various military facilities. As the GM Sniper Custom served as its base machine, the GM Guard Custom maintains high mobility yet has enhanced defensive abilities like its huge shield – the "Guardian Shield". During combat, a movable visor on the head would be lowered and is equipped with composite sensor system. The high performance of the machine resulted in it being difficult to control, thus it is mainly used by skilled mobile suit pilots. This also contributed to many of the GM Guard Customs surviving the war.
History
During the One Year War, after the destruction of Solomon, a GM Guard Custom along with a RGM-79SC GM Sniper Custom, a RGM-79KC GM Intercept Custom and several GM units pursued Dozle Zabi's Gwazine-class until they were intercepted by Zaku IIs and Rick Doms.