Looks pretty good! I think you would benefit a lot from breaking up the materials further. The texture looks good but some elements look too similar which means the different parts of the gun will bleed together visually.
You've got some great references, I would experiment around by:
1) Darkening albedo for the grip and make it less smooth in microsurface
2) lightening up the screw in the grip to resemble a more bare silver / steel metal.
3) Changing the safety, firing mode, and other selectors to be a darker grey, but light enough to contrast with the gun metal.
4) most importantly mess around in photoshop to select some of the noise in the metal to make some specs catch some more light than others so you can copy the effect the gun has in real life.
Replies
You've got some great references, I would experiment around by:
1) Darkening albedo for the grip and make it less smooth in microsurface
2) lightening up the screw in the grip to resemble a more bare silver / steel metal.
3) Changing the safety, firing mode, and other selectors to be a darker grey, but light enough to contrast with the gun metal.
4) most importantly mess around in photoshop to select some of the noise in the metal to make some specs catch some more light than others so you can copy the effect the gun has in real life.
I made this in a minute but you get the idea.
Edit:
dead links -.-