The RGM-79C GM Type C (aka GM Kai) is an improved version of one of the Earth Federation Forces' first mass production mobile suit, the RGM-79(E) GM Early Type. It first appeared in Mobile Suit Gundam 0083: Stardust Memory.
Technology & Combat Characteristics
This improved model of the GM Early Type was similar to its predecessor in overall capabilities. However, the C-Type did feature greatly improved thrust and maneuverability. Furthermore, its armaments was added with several new weapons, most of them also fielded by the standard RGM-79 GM and its variants.