Wow. I really like this expansion of the LEGO Exo-Force theme. By the way, have you ever considered doing an Armored Warriors/Powered Gear-type fight scene with some of these mechs? I think that would be real cool if you did that on your next MOC.
This is very good weapons platform and I like the guns. I have to admit though I'm having mixed emotions about chainsaw feet. The concept is interesting but I would think walking on the blades would do more damage than good. Maybe if they had some kind of retractable sheath it could work.