Mossberg used to make them like that for their bolt action shotguns, and they did make some bolt guns under the JC Higgins name. Not sure if they ever put them on a pump action though. The ones I have have 3 knurled bands around the threaded portion, with the guage and choke stamped between the second and third band, then a smooth tapered section that forms the choke. Does that sound like what you have?