The MS-06C Zaku II

The MS-06C Zaku II is a mobile suit featured in Mobile Suit Gundam: The Origin. They were used during the Battle of Loum.
The redesigned prototype of the Zaku I MS-05 was the MS-06 Zaku II. The power pipes were mounted externally, and the machine was designed so that the output of the fusion reactor could be increased to allow for greater expandability. An "A" was added to the model number of this pre-production prototype, which was known as the MS-06A Zaku II. The results of its functional testing demonstrated that its performance was enough to satisfy the leadership of the Principality of Zeon forces, and they decided to adopt the Zaku II immediately. Its mass production began in time for the outbreak of war.The first production type of the MS-06 Zaku II was a mass-produced mobile suit with some improvements. A "C" was added to its model number, and it was classified as the C Type. The fixed shield and shoulder armor that had been introduced as defensive equipment in the MS-05S Zaku I were also formally adopted, and this type was produced in large numbers as the main machine of the Principality of Zeon. The MS-06 Zaku II series would ultimately consist of countless minor variations based on this C Type, such as the C-5.