Technology & Combat Characteristics
This prototype mobile suit was manufactured by the Principality of Zeon armed forces as an improved version of the MS-03 No. 3. The name "Zaku" was decided as the name of the first mass-produced mobile suit to be developed next, so this machine was given the name "Prototype Zaku".
The Prototype Zaku was the first machine to be equipped with a nuclear fusion reactor based on the application of Minovsky physics, and the ZAS-X7 prototype nuclear fusion reactor manufactured by ZAS succeeded in making it more than twice as mobile as the MS-03, despite its heavy armor.
A hand-held 100mm machine gun, the first armament exclusively for MS, was also developed at the same time as this machine.
This was an armament that fully utilized the versatility of the human-shaped MS, but the 100mm machine gun itself was considered insufficient in terms of firepower, and a more powerful armament was sought.
History
The Principality of Zeon and Zeonic used this machine to simulate basic maneuvers in all phases of space, under gravity, in the colonies, on the moon, and in various other situations, as well as a wide variety of tasks and long-range and close-range combat. Based on the data obtained from these simulations, the company proceeded to improve the armor of various parts and develop armaments, and the MS-05 Zaku I, the first real combat-oriented MS, was completed.