I fixed the textures and made it fully compatible with NWDM
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3592723753

Glad to help!

Hey, thanks so much for your guidance! This is a great mod, I reckon I'll make a more heavyweight version of this mod in your style when I get the time.

Hey there! I see you want some help with making the textures work. I don't know how to make the vanilla textures map properly, but I DO know how to let you use the mod's correct textures when you craft them, if you want. I did this in an equivalent mod for Hives Expanded .

Basically, you need to make a new weapon smithy station that is set to use the modded weapon models. Then, you need to add those models to the "Homemade" manufacturer and let the player unlock them through research.
That's essentially it, but I recommend making it so the Homemade models use the same quality numbers as some vanilla grades. That way, they shouldn't interfere with how you craft vanilla weapons.