The RGM-109 Heavygun

In the U.C.100s, as the scale of conflicts reduced and anti-Federation movements subsided, the Earth Federation Forces decided to adopt miniature mobile suits to save on military expenses. The first miniature mobile suit to be mass produced was the RGM-109 Heavygun developed by the Anaheim Electronics, and it also served as a proof of concept. First introduced in UC 109, the Heavygun was the first successful mass-produced miniature mobile suit created by Anaheim Electronics and sold to the Earth Federation Forces. It replaced the aging RGM-89J Jegan Normal Type and quickly proved to be a popular model among the pilots. Though the first decade of its deployment was relatively peaceful, the following years saw periods of intense conflict between the Earth Federation and several space-based factions including Mars Zeon, the Crossbone Vanguard, and the Jupiter Empire. Eventually, the Heavygun was phased out in favor of the newer RGM-119 Jamesgun and RGM-122 Javelin.