The Deer Gun.

http://en.wikipedia.org/wiki/Deer_gun

I'm passing. Someone go ahead.

I don't know how obscure this really is, so here's a picture from a bad angle.
If no one gets it, I'll post a better one.

Croatian RT-20 anti-tank rifle in 20 x 110mm Hispano.

Also, I don't think ersoz's was a Joslyn, it doesn't have the side-mounted hammer, and the Joslyn never had a spur trigger.

I'll come up with one in a bit.

Here we go.

It was NOT a revolver.
You got the model name wrong.
It is a Josselyn " Chain gun". There is a big difference.
And, did you even google your answer?

Your answer was NOT correct.

Calm down, it's all good. I imagine it's called a Chain Gun because the loading belt looks like a bike chain?

Simeon North Model 1843?

I'm calm. That is the official name for it. Its inventor named it so in 1866.

I made a mistake. The inventor did not name it a chain gun or anything else.

http://www.google.com/patents?id=qUU...page&q&f=false

My sincere apoligies. It is rather a common name given to this very specific handgun.
Having said so, in my opininon it is hard to define this handgun as a revolver as it lacks a cylinder.
Please forgive my interruption.

Yeah a chain gun if you're riding a horse and not a C130 gunship.;)