Looks wicked! Only thing I see that is iffy is the variation of colors. Your gold material is consistent throughout, but every other material seems to only be used once. I count 6 of them. Try reducing that count to 3-4, reusing say the 'granite' material where the blue is on the gun.
Logged
Looking to collaborate. Hit me up, especially if you are a GM programmer, or if you just have some sweet ideas.