Hey guys here is some designs i use Zbrush for anything modeling ,texturing rendering .

kinetic armor by on deviantART (again, very Dust 514 styled -Jukka)

Christian Pearce

Character design and concept development - Elysium - Droid by Christian Pearce

Robots to out number Soldiers by 2013

US Army robots will outnumber human soldiers 10 to 1 by 2023