Basic shape concept is a little better (thinned the waist) so I've dived in and done a quick fill out in 3D to see if it is looking bulky enough. At the minute I'm preferring it without the shoulder pads and probably with some more 'ship' sections around the back of the calf area to bulk it out lower down but things might change

Oh btw if you were wondering about weapons then he's more of a run in and do a bit of hand to hand combat type of guy
Those shoulder pads could double up as a shield and/or weapon....hmmm...

https://www.flash-fx.net/3D/images/tr...s/concept6.jpg

https://www.flash-fx.net/3D/images/tr...ers/model1.jpg