I mostly just use the sniper so I was like, damn this is some boring texture and i fixed it for me.
I just added a custom forest camo, some dried blood on the handle and the end of the stock from when you bashed that raiders head in.
Also some scratches and such. I did edit the spec and normal map a little so its not just a slap on color texture.

Just use NMM and bla bla you should know how to use mods.