Briefly: this is my attempt to give a little bit of love and polish to the FN Five-seveN. The meshes and everything still look good. The issue was the specular.

Here's the Before image:



You can see the issue - and it may be exaggerated by my ENB config, I don't know, but it was a bit overly shiny, like plastic.

So, I opened up photoshop, hand adjusted each of the _s textures (referencing a few other newer weapon mods) and triple checked everything looked right in engine. While I was at it, I normalized the normals and saved them and the _s in BC5. I also checked my result against some reference photos. It was a challenge, trying to find the right balance to capture that polymer look, but I learned a lot in the process, and, well. See for yourself.

Behold: 



Basically, the trick was getting all the polymer bits looking like polymer and keeping the metal bits looking like metal. I THINK I did okay. For good measure, I ran everything through Bethesda's texture optimization tool to bring all the diffuse textures to BC7 compression. They may be slightly less compact but in my experience, it helps the visuals somewhat at times.

This is JUST a texture/material replacer for the original mod, so, download that, endorse, etc, then overwrite the files with mine. I've left the materials loose and packed the textures into a new BA2 file (may offer loose files if needed later). 

Many thanks to Sudniro for the original FN five-seveN mod, and for giving me permission to do this.