That’s a really nice rifle. Congratulations on acquiring it. Has very elegant lines. Regarding the question about scope rings, there’s a member of the forum, his forum name is Der Ami (Mike), who seems to know a lot about fitting scope rings. Perhaps he will come along and provide some input. If not, you might try private messaging him. Regarding the sling attachment, when you get it in hand, it will be easy to tell if those standard swivel bases meant for standard American slings for example Uncle Mike’s quick detach (QD) swivels, or they are the larger eyes meant for a leather thong or steel hook like Parabola mentioned. The QD swivels are available in every gun shop in Walmart around the country, and you can easily see if one will fit appropriately. If a QD swivel is incredibly loose, then the holes were meant for a leather thong or steel hook. Just from the picture, I expect they are designed for standard QD swivels. Congratulations again, and let us know how it shoots!