I was really quite surprised when I came upon the Rossi circuit judge, and saw it classified as restricted. I have been looking into revolver carbines for a while and checked with the CFO regarding their classification. Specifically the Uberti 1873 American carbine models (6-shooter, long barrel, butt stock) etc. are non-restricted. But here the receiver part accepting the stock differs from regular revolver handguns, you could not just mount a pistol grip to it.