I suspect it's supposed to be source lighting. If so, then some suggestions: decide on what's glowing and work from there. If, for example, it's the 'barely contained energies' of the weapon, all the glowy parts should be towards the clear green part of the weapon - the shoulder pads should glow lower and fade as they curve up, the areas shades by raised surfaces on the weapon should be darker, that kind of thing.
Still, dang impressive looking! Better'n my stuff (which I need to scan and post sometime)
-Vulpin
nice "glowing" effect on the gun head and shoulder pad but why didn't you paint the chest arms, legs etc the same way? It might give a more awesome look to your mini