Are there any gunslings in the 54mm scale you guys can recommend?
GW's Slick Devlan, because we have to cover the obvious first (http://www.games-workshop.com/gws/catalog/productDetail.jsp?catId=cat480007a&prodId=prod1110246&rootCatGameStyle=)
Ares Mythological/Dark World's Jhonn Creek (http://www.aresmythologic.com/v2/en/dark-world/98-dw-01-jhonn-creek.html) - a little more of an enforcer model, but give him a second pistol and it could work!
Got both :)
I was hoping for a more Western feel :)
Andrea miniatures does a range of wild west themed models. I think they're all 54mm. Reaper miniatures has a Cowgirl in their Master series range and a Hive ganger style gunslinger as well.