The Armadillo Heavy Armor Assault Vehicle was designed to fill a gap in space marines forces. Namely, a fast yet heavily armored land vehicle that could handle a lot of damage and also deliver some in return. Wider wheelbase, dual redundant tires, and lots of room are just some of the finer points of this rather mean-looking machine.
This is obviously not one of your better mocs. From what I see, the overexposure of studs and some misplaced slopes give this moc an unfinished look. I like the concept of the armored vehicle, but you can surely work on the meager twin cannons to balance attack power with defense power.
The shape is very good, but it needs more colors and details to make it awesome. You could try using some light gray, tan, or brown bricks for a camo effect. Handrails and canisters and panels and stuff would be good too.