I first encountered this murderous creation of L. Doine Invor when my Grandfather took me to the PANHANDLE PLAINS MUSEUM in Canyon, Texas. He explained to me that it was actually three weapons in one.
In its 'carrying configuration' it was a set of brass knuckles capable of pounding one's opponent into a bloody pulp.
There was a knife as well. When this double edged ribbon of steal was deployed a man could be sliced to pieces.
If neither of these weapons was equal to the task the brass knuckles unfolded to make the grip for a revolver. Unfold the trigger and your enemies could be annihilated in a hailstorm of bullets.
I shuttered, realizing this deadly device was mere inches from me behind a thin sheet of glass.
Others are, is functional the right word?
Pin fire cartridges seem to were in production in France longer than in the United States. Reloading equipment and components for pin fire cartridges are available in Europe. Be warned, they ain't cheap! It would take a very determined owner to be able to fire one.
Having said that, the pinfire cartridge seems to have a good track record. It only complaint I got on them when I made an inquire a while back was moisture coming in through the pin channel. If they are dry, they usually work.