These look absolutely brilliant. Awesomely designed. That would be great to design, I've yet to have the eye for military design. I love it but don't transfer what I have in mind on paper too often, especially when it comes to designing weapons or vehicles.
Oh yeah, break out the infantry while we're at it! Looks like a ground assault somewhere and someone is going to be feeling some hurt with these guys! Really detailed work all around. I don't think the orcs and goblins have much chance against them!