Quote: "Also, when adding scratches to your texture, you should stop and think "Why is this here?" instead of just brushing randomly."
This is a very valid point, as much as I like this texture job, the scratches are far too uniform and in some odd places, you need to break it up a bit and put it in areas where the weapon would naturally get worn out.
Also worth looking at is material definition, your gun seems now to be made of a mix-mash of concrete, metal and clay, probably because of what base you've used for the texture, which probably isn't the wanted result.
A good idea to keep in mind is that metal in general is very monotone, it's the specular of it that gives it that slight hint of color (usually blue) that gives it that nice metal look.
That's just what I think, looking good though man as usual.
Alucard94, lacking proper intelligence.