It looks good, Mech crit away;
Its very rigid, try making the design flow better. The weapons are stuck in place on the torso, not very good for a moving target. Its centre of gravity is too high aswell, it looks like it'll just topple over. The hip joints need about 90* roll giveway for turning. Most people use ball or roller joints here so there allowed a great deal of movement, same with the shoulders, ankels and wrists.
Mechs tend to have a bent knee pose to balance the weight better. Think about when you stand, your legs arent perfectly stright you bend your knees to take some on the weight and so you can correct you posture. The upper chasies needs better connecting to the pelvis, which again people use some sort of ball joint or overlapping armour segments.
On weapons side of life, missiles on the outerside of the arm. That way if there shot/damaged and explode they dont take the arm, or in your case the pilot.
Thats all i can think of right now
Keep at it!
Heres a reference site for you to look at;
http://fu(*)(*)yeahconceptart.tumblr.com/
Remove the (*) and place the rest of the word in.
I have others but there well not for here with some of the stuff they do.
