Back before the 870 express Remington brought out the Sportsman 12 with a fixed choke vent rib barrel for 2 years. On the 3rd year they put the Vent ribbed Rem choke barrel on it. I bought one of those used ,dirty but in good mechanical shape for $165. I pulled the barrel off it and put it on my Magnum model Wingmaster to replace the 30" VR full choke barrel. That spring I took the rest of the sportsman 12 and put it sans any barrel on my gunshow table and sold it for $135, yup got $30 in a VR Rem choke barrel. I could have kept it and put a slug barrel on it to, lotsa options when you think on it some.
