MS-0127MP Gun

The MS-0127MP Gun (or Gun, pronounced Gan), is the first fully fledged mobile suit ever developed, spearheading the beginning of development and mass production of mobile suits as weaponry as well as becoming the basis for many other design lines to come. As of current, it is considered a Mass-Production General Purpose Type Mobile Suit.

Technology and Combat
The many first models were lightly armed, mostly shoulder-mounted turrets and arm-mounted chain guns. But soon their arms would come into more use and the first line of mobile suit-equipped weapons would appear, the most widely used the JG-02D Machine Gun and its later variants. For the first couple uses for these units would encompass ranged and artillery combat, the Gun's agility would perpetuate the development of mobile suit-sized melee weapons, some crediting it due to the incident of a member of the military using a lamppost as an improvised stick. The PP-0K Tactical Alloy Sword, a large one-bladed sword made of strengthened alloy, would become the most used melee weapon, notorious for its sharp blade, durability, and lightweight property.

Mounted Gatling Guns were still in use, and soon Missile Launchers were added into their arsenal. Their flexibility in customization and effectiveness of use despite their visible shortcomings, especially on their power supply (most evidently before the completion of the Infinite Engine), the Gun would serve use for more than a century, used by many factions all over the world for various differing purposes.

History
The Gun was first developed with the intention of acting as small scale peacekeeping units that would easily outmaneuver similar-sized tanks and other machinery, but still packing equivalent firepower. In addition, the humanoid features such as their arms would enable them to perform acts normal machinery such as tanks couldn't. This comprised of doubling as machines for manual labor, among others. However, realizing its great potential during testing of the very first model, the developers went ahead and expanded on its concept, and eventually, the "true" Gun model would be born. Its performance exceeded expectations of many, much thanks to the Linear G-Pressure principle and hypothesis conceived by one of the lead researchers, John G. Hinges, which was applied in the design of the Gun's frame.

Trivia

 * The Gun is another expy of Universal Century's RGM-79 GM, in keeping with the tradition of mono-eyed mobile suits in the later series.