Em might be right, are your normals inverted? Either that or you just got a really rough bake. But those normals are hurting your model real bad. And Gazu is right about the material. The frame of the UMP is made of polymer plastic, not metal :/ Not sure about the magazine but it's most likely a blued metal so you should…
Here is my low poly 2.6k polys. I already see a few problem areas. Just posting what I have right now. Comments appreciated. Also, I would like some input on creating spec maps. I'll post my maps in a min.
here's what sticks out imo: -super blocky right hand grip -black stripes on edges (probably can be fixed by setting padding in baking options to higher value) -lack of optimization -stretched texture on certain faces -red stripe looks like it's carved in metal and it's almost glowing -scratched areas seem to be too bright…