The MS-06K Zaku Cannon is a variant of the MS-06 Zaku II produced by the Principality of Zeon. Debuting in the original design series Mobile Suit Variation, its design was later updated for the novel/OVA series Mobile Suit Gundam Unicorn.
The Zaku Cannon was developed out of the Zeon's MS-06J-12 Project, which was to build an anti-aircraft mobile suit. The project was change to include mid-range support capabilities following the appearance of the Earth Federation Forces' mid-range fire support RX-77-2 Guncannon. The Zaku Cannon was based on the MS-06J Zaku II Ground Type and has a powerful 180mm cannon mounted on the backpack. Its K-type backpack can be replaced with a Zaku II Ground Type's backpack when needed. The Zaku Cannon featured a 360 degree camera eye for improved vision and target acquisition, and had more powerful thrusters in its legs to overcome its increased mass. However, the Zaku Cannon suffered from poor balance due to the 180mm cannon's recoil and as a result, only a limited number of units were produced.