The RGM-79C GM Modifed, or most recognizable as the GM Kai, is one of the 'better' GM units in UCGO. Only one point of difference in Armor compared to the RGM-79(G) GM Ground and noticable lower MS Skill requirement, the GM Kai is a highly favored mobile suit of choice for EFF players. However, though appearing a fraction of difference, the GM Kai's actual performance vs. a GM Ground are different, with the GM Ground being far more durable. Inexspensive to craft yet useful, the GM Kai is efficent as a 'hybrid automobile' of price and performance.
Also featured in Gundam 0083: Stardust Memory.
After the recent update, The GM Kai's Mobility has been increased. This applies to old and new GM Kai units.