Origin Zakku II, the Zaku II Type C.
Had a few hiccups with this build, but overall I like this model. It's a much more vibrant green than the olive drab of normal Zakus and it came with a fair bit of options.

One of the key things to note about this model of Zaku is the "Hyper Rifle", which seems to be either a variation of the 120mm or some form of the 105 used by the Zaku I, save it foregoes the top drum for being belt fed by a hopper on the back.

In addition, the C type has options for some chest mounted weaponry, either a pair of 30mm Vulcans, a pair of "Laser Guns", or one larger chest Vulcan. The other addition was a forearm mounted 20mm machine gun pod. I mixed and matched with mine.

The Zaku II was easier to maintain and more adaptable to various combat situations than the Zaku I, or so the wiki says. Nonetheless, the II would become so mass produced that it would become the standard by which all future MS would be measured.

Even after the One Year War, the Zaku II would be around in one way or another, including providing the template for a next gen Federation Mobile suit in one noteworthy instance.

13 years of Mobile Suit development in one image.

Zaku II too cool to be seen with these dorks.

And the situation turns dire for the cyclopses as GM Kai shows off his new mega laser. No Gundam needed here, I suppose.
End of thread I suppose.