12 gauge. Fixed choke. Non-vent-rib, 28-inch barrel (though I'd like to find a VR in Modified or interchangeable chokes in 26-inch... think anyone will have one?) I took the barrel off the gun last night and looked closely at the markings on the bottom of the barrel... and I can't see any obvious marks that would determine the choke size. There are a lot of "finito" proof marks and other stuff but I don't know what the choke would be in italian. And no, I don't have a set of inside calipers. Any home remedies for determining choke size?