Thanks for that information. That was my suspicion, but the confirmation is appreciated. I am a fairly competent mechanic/gunsmith as long as I know what I am looking for.

With the current problems with photo sharing, I am not set up for photos at this time. The carbine was a rather derelict sporter conversion with a semi-inletted repro carbine stock that someone had started to install. I managed to undo most of the damage and finish the job in sporter form, less the handguard with a  Lyman peep sight. The rifle has a Fajen stock and side mounted scope.