hello i know they made singles shot shotguns from 1909-1956 and champion was one of them,,as for the newport line and interchangability i really couldn't say for sure..mabey someone will chime in on this one ,,
bigcurt
Yes Iver Johnson did build shot guns with for Newport. I have a 16 ga Newport that needs a new shock and fore arm, of with I will make myself using my 12 ga Iver Johnson Champion as a pattern. Mike D.