I had a Marlin Papoose for a year and a half.
After two trips back to Marlin, they managed to get it from a totaly unreliable POS to a semi-reliable gun that woulod only jam once a magazine.
It had a habit of not ejecting the empty shell, and jamming it against the top of the receiver with the incomming round wedged halfway into the chamber. It took a screwdriver or needle nose pliers to clear it. PITA.
I took it back to the gunshop with the paperwork from Marlin, and they took the gun back.
Now I'm not anit-Marlin, I have two model 39's that have been the best guns I've had. But the model 60 based papoose is a mediocre gun at best, and very unreliable at worst. Over at the rimfire central site on the Marlin forum, they talk alot about fixes for the problems of the model 60 and related actions.
Want small and light? Get a CZ scout.