I don't understand your question.... The quick attach mount with rings that Valmet made for the 412's was made "for, 412's" and didn't fit Tikka's bolt guns ect....

I did design and sell a few bases that would accept those same 412 mounts for 700 Rems and round top Ruger 77's, But i do not know of any other guns the 412 mount will fit except the current 512's and old 412's...

Perhaps you can clear your question up a bit for me?

DM