Odd Shading. Help please

I’ve got these edges showing and I have the mesh set to smooth shading. I know the textures are off it’s an early take on it. You can see what I’m talking about really well on the rim in the back and around the holes on the sides. Any information will be greatly appreciated.

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Ok so it has something to do with the normal map I was able to figure that much out. It’s a map from poligonal.com mixxed with one from DDO I have my uvs facing up so I wouldn’t have problems with mismatched normal directions. How dose a normal map cause this and is there any way to fix it?