Need help identifying pistol

[Ruger888]

Not really sure what I have here. Picked it up at a gun show because I have never seen one like it. Can't find anything on google searches that match it. It's a falling block or rolling block pistol.

 

[brokeasajoke]

I'd swear that looks like a Stevens Favorite made into a pistol if it wasn't for the piece directly in front of the receiver.

 

[TargetDriver]

I believe Stevens called that a Crack Shot. I've not seen it in a pistol format but the action looks identical and it could have been modified from rifle/carbine.

 

[brokeasajoke]

Seems that the crack shot did not have a hexagon barrel but round all the way back to the hammer where as the Favorite did but I'm not 100%