Yeah, I agree with HAL and what the others are saying. I think your normals look really good, but you sort of killed it with your diffuse and spec. Have you ever seen racer's tutorials? You might want to check them out. He goes in detail about how he makes his metal look realistic, and stresses to use less scatches and…
You scratched almost every edge on the grey metal............. Like solid scratched surface on every edge......... The ammo clip should be a grey to seperate it from the gun body and make it more distinct. Your tri count is pretty high and your texture seems to large since there doesn't seem to be a lot of detail in your…