I'm lovin the glowing parts and the way its dripped down at the side, very cool idea
The textures progressing well, makes me think I have go back to my gun and dirty up the maps a little.
I still a noob at textures but I can make a few sugestions....
The main part I think could use some work is the metal tube. It looks really low res and pixelated. It is the nearest object to the viewer but it looks like it has been assigned the least texture space. Maybe if you ran a despeckle filter on there or something
The yellow paint work is bitchin. Very unreal, but I think a little unsharp mask would tighten it up nicely
The 3 black inlets at the bottom dont look like they sink into the body of the gun at all. I think you could use a small bevel or some inner/outer glow to give them more depth
hope thats a help