RWBY is pretty bad I'd avoid it I only bring it up with Rawhide since he inspired me to watch it and now I'm just kinda stuck in it until it dies. Ah, the things I do for my internet friends and viewers.
In that case, though it's a manga and not an anime (because life is simply unfair) read Et Cetera. It's a really good modernish western. Lotsa a gunslinging. One of the protagonists is a gender swapped Benkai, with guns instead of swords.