This is a one off custom job I found browsing the web, but if they were available I'd snatch one up in a heartbeat! 5 shot, single action, .22LR or .22 magnum cylinders... IMO just about the perfect pack rifle for small game.
http://www.gunmartblog.com/2010/12/greatest-naa-mini-evah.html
http://www.gunmartblog.com/2010/12/greatest-naa-mini-evah.html