This guy comes directly from the gallery of Morriperkele at DeviantART. True, I made the 3d model, but it was his idea. Modeled and rendered in Blender, textures and some color re-balancing in the Gimp.
As you can see, this guy has a really big gatling (or "mini") gun. The helmet is the largest departure from the the original sketch, at the request of Morriperkele. This one might look rather dumb, but at least it's different. The model is available at this location.