Thank you, I'm happy you like it.
As for the Ironsheath, well. It's based off a wheellock pistol with a rifle-esque tube magazine, more than a revolver. I wanted to go with something very archaic in appearance to fit the fantasy-medieval feel of the world, and I think revolver drums were somewhat more modern--the oldest type of revolvers I'm aware of are the pepperbox guns from the 1500s, and they look kind of silly.
Though now you have me wondering if there's such thing as revolver-drum wheellocks/flintlocks. The idea is pretty interesting...I'll have to do some research, thanks for the suggestion!
EDIT: I'll be damned, there is! The 1800s is kind of late in tech, though, but it looks really cool.