Technology & Combat Characteristics
A heavily modified GM III equipped with FA-78-1 Full Armor Gundam's armor parts used by the Gleam Black Guns (GBG) mercenary group. Although its base Mobile Suit is is an older model, its internal components such as avionics, generator, thrusters, and armor material replaced with the one used by RGM-89J Jegan Normal Type. In addition near all of it body parts except the mechanical parts are painted in "pitch black" color, like the other GM III used by GBG, to make it more "stealthy" while also harder to spot by enemy MS's sensors. Thanks to those modifications it turns the GM III into a heavily armed MS that capable to perform on par with Earth Federation Forces' high performance MS such as RGM-109 Heavygun and F90 Gundam F90.
History
In U.C. 0112, the Full Armor GM III is part of GBG mercenary group that were hired by Oier Randegger to aid him and Griselda Jiah, in an effort of testing the RDG-3 Tigris by luring the Earth Federation Forces' F90 K Type into a designated location in a Shoal Zone. This unit is piloted by Matrika Vikara. During the battle it was mostly guard the Tigris' from enemy attacks, but it also manage to destroy a RGM-109 Heavygun and engaged the F89 Gundam F89 on equal terms.
Later in U.C 114, a GBG squad that included the Full Armor GM III, RGM-86RN GM III Euryale and the RGM-79SC GM Sniper Custom was sent to eliminate a terrorist group in Side 6 Shoal Zone. The GBG squad eliminated the terrorist group with ease, but soon discovered this was a trap set up by the Zeon Remnants group "Legacy", who then attacked the squad with a dozen OMS-1004 Tigris IIs. During the ambush the Full Armor GM III fought fiercely, but it was destroyed by the overwhelming numbers of Tigris II.