Pretty sure that wasn't done by Marlin I have never seen a Marlin like that,I can't find anything in my Marlin book that that was ever done
Must be some after market set up back in the day looks good though.

Is the milled out hole blued or is bare metal showing that would be a tell tail sigh it was done after market.

Did you get both guns from the same person?

Last edited by Mossyoak1957; 04/03/20.