On this Remington Noiseless 10, the drawband snapped and the main spring is most likely detached, if not broken, inside the drum.
But I can't see how to pull the drum out. Does the frame need to be disassembled? That's what I'm trying to understand (I looked at the service manual and Ames manual vol. 3, but things are not clear to me).
https://imgur.com/a/EQ0dlO5