When I was a Sonarman in the Navy (1962 - 1965) I spent quite a bit of time reading through Stoeger's Shooter's Bible when there was nothing else to do. I remember the Harrington & Richardson offerings included the Topper, which was available (IIRC) in .30-30 and .22 Hornet and 12 or 20 gauge. It was also listed as a combination of one rifle and one shotgun barrel.
-WH-
