Its a 5" for sure. They had a 6" gun there for about $250.00 more. Also with a Bo-Mar rib. I think that was built by "Spokhandguns" not sure of the spelling. When I initially picked up the gun, I opened the cylinder and closed it. I could then spin the cylinder "backwards". I'm not sure if this is a big deal but none of my K frames do this. I'm not afraid to take these things completly apart and fix things, but does that cylinder spinning backwards indicate a certain amount of use? Thanks again for your response.