Reminds me of that JL episode where they get thrown back to the old west and beat up some criminals and take their clothes. In the episode though, John Stewart tells Wayne he won't be scaring anyone with those empty holsters, and asks if Bruce is sure John shouldn't lend him a piece, to which Batman replies - "I'm SURE. Now, let's ride!"
Or something like that. Aggh I'm such a nerd. Still pretty groovy illo though! It's just that there is already a cowboy Batman with loose morals and his name is Jonah Hex.
Oh and I hate to get sentimental but your art makes me giddy like a schoolgirl's crush. So dreamy, dude.
Except that the version of Batman that used guns existed for less than two years, back before they had nailed down his origin story and such. If this Batman has at least a similar origin involving his parents being gunned down when he was a child, there's no reason for him to be using guns.