All new marlin mags are interchangeable between all like caliber guns. The papoose will be back, I heard Remington is going to be doing a production run of them in the late spring, should be available up here by summertime. All the old factory ones have been sold off I think... Remington has yet to make them. But I for one hold my breath on the quality of these new models for this particular gun. The reason they cost so much more than the 795 is because the threaded sleeve and barrel shank have to be constructed just right, with a substantial ammount of hand finishing to work properly. NOT remingtons strong point. We shall see.
I almost sold mine recently... Thank god I snapped out of it. I traded off my 60 instead. My papoose is easily the most accurate .22lr semi auto I have ever shot.