Charter Arms has been talking about this for a couple of years but I hear that the 40S&W Pit Bull is now shipping!
This snub is about 20oz and a 5-shot. Its big advantage is that it fires 40S&W! More importantly EXTRACTS the cartridges without the need of full moon or half moon clips. I nice trick considering the 40S&W is a rimless (nothing for the extractor star to grab onto) semi-auto round (ok, ok, semi-rimmed but still not normally doable in a revolver).
I know some folks sneer at CharCo and it has been a long time since I have owned one, but they have a long history of innovation. You know the 'drop safety' that all modern revolvers have today? That was pioneered by CharCo and GIVEN to gun companies royalty free!
I seem to be carrying 40S&W a lot and it is definitely a lot less expensive to shoot than 357mag but more punch than 38SPL (IMO) although I do wonder about speedloaders?
Definitely neat and worth checking out. Oh, 9mm (+P rated) will be coming out shortly and 45ACP later.
Charter Arms Co. Pitbull 40 Product Page
Pic from their website: