Some of the skins I made for the Revolver in Diabotical Rogue. Most of these designs I also authored for the other 11 weapons in the game. On Diabotical Rogue we designed weapon models to be a somewhat plain canvas that could accomodate many different designs for cosmetic skins.
The original revolver model: https://www.artstation.com/artwork/x3oQqX
The Revolver model is by the talented: https://www.artstation.com/omar_chaouch