From time to time these come up like this

As a transitional cartridge gun, especially one featuring the pinfire rifle barrel, the rapid evolution to central fire left some very clean examples like this sitting unused as the newer and easier to manage system swept the marketplace

Still there's the missing gear for this one
A case and tools would definitely complete the picture, even more so if there was a mould for the rifle barrel

As it sits, it's a time capsule
Getting one like this into service isn't terribly difficult for someone with determination, skills, and tooling

I'd run it