I Did a search but could not find any info. Are 77/22 and 10/22 scope rings the same? Do they mount to the receiver the same way? I want to go to a 42 mm scope on my 77/22. I currently have low rings and a 40mm scope mounted with 3/16" clearance between the objective bell and the barrel. I think the medium height rings would give me the clearance I need. I can find many rings for the 10/22 but no luck for the 77/22. Thanks for your help.