Wow this is really good! The coloring really gave it that post-apocalyptic atmosphere!

ho-man, i love this! excellent work!
i love the laser-rays on the bot's head, and how it has a red eye watching the action, and a huge gun to control the situation, but man i think the pic is blurry in the middle. was that on purpose?
if yes, then ok, its a nice pic
if not, then fix it , it is blurry.

(tho, in any way, better keep it clear rather than blurry in the middle, just blurry the back background, like the city buildings or something, and not the robot, it would be a great contrast if the robot was crystal clear, and the BG slightly blurry.

anyway, good art, it rocks so hard!