French firm Verney-Carron manufacture a nifty dual barrel less-lethal pistol called the Flash Ball.
The gun fires 44mm less-lethal balls. The company claims they contain 20% less energy at 7 meters than a .38 Special. The company has also developed a round which deploys seven CS cartridges in the air to create a cloud of CS gas covering an area of 400 meters^2.
This gun cries out to be rechambered 40mm grenades!
[ Many thanks to Sven (Defence and Freedom) for emailing me the the info. ]