Having left the People's republic of New Yawk some years ago, I can't give you accurate, legal information. I would advise contacting the New York State Police and ask them directly. When I lived there it was legal to OWN a cap & ball revolver as long as you did not possess the components to load it. Owning black powder (or pyrodex) and balls or percussion caps along with a C&B revolver would require you being licensed to own a "handgun." A loaded C&B handgun without a handgun permit would net you 1 year in prison. This was true for any black-powder muzzle loading handgun, even a wheel lock or flint lock. I doubt things have changed much if at all. Don't take chances with the NYS Nazis, don't just drive to Vermont, move there permanently.