This Pedersoli Rider derringer is pistol, and i'm talking about revolver. Here You can see patent drawings:
http://www.remingtonsociety.com/gall...serialNumber=2
And here pictures of Remington Rider revolver converted to .32 rimfire (originally it was a percussion revolver):
http://www.american-firearms.com/ame...3inch-left.jpg
http://www.american-firearms.com/ame...inch-right.jpg
As far, as i know there was manufactured about 115.000 Remington Rider's revolvers. And there are no company who makes reproduction of this revolver. On patent drawings you can see internal mechanism, but it looks very complicated, and unclear for me. It's even more difficult to figure how this mechanism works, because before they start serial production of this revolver there was introduced some changes in mechanism, like removing loading lever, and trigger guard was no longer spring for cylinder stop.
I also found a text part of patent on remington society page, but my english is too bad to fully understand how it works.
http://www.remingtonsociety.com/gall...g2_itemId=1472
If anybody have any ideas, how it can work, please make a drawing, and post it here. Sorry again for my english, and i hope you know, what i mean.