RR's MkII 5* is fitted with it's original Sutherland sight, and Fenian's Mk II sounds like a 3* version to me, and it came with the Canadaicon Tool "Pilblad" sight- either the Patent-applied-for early version (Mk V with the extended elevation knob) or the latest version, with the flush knob. About the only common factor in both sights is the aperature; 0.080" (Canadians- please do your metric conversion as required by your late-lamented leader, PET). It would make answering questions so much easier if the correct variation of MkII Ross were quoted in the original question(s).
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