it is a vintage 1870s rollingblock or single shot shotgun. .20 cal or 12gauge. Its a Norwegian shotgun. That is very very long. And has a "barrel stick" attached on the bottom. Its considered extremely rare. And sells at auctions for 1500-2500$.

4.5 ft long. And about 6 inches high(barrel) and 9inches high (stock)

my father had it before me. And his father brought it over sees and used it before him. And now its been given to me.