Those rings that come standard with the Tikkas (that I've seen) are not Optilocks. They have no polymer inserts. They are a cheapie ...perhaps a Millet. The supplied screws are very soft too so I'd recommend getting some SS replacements if you stay with the supplied rings. You can get real Optilock mounts to fit Tikkas, but they are a little pricey. The tikka top is not tapered like the Sako so they are different. Check Burris and / or Warne for their version of Tikka rings or ringmounts. Leuppy's are o.k. too. I don't know for sure about Talley's or Conetrol's to fit Tikkas. Give each mfr. a call and see. Good luck.