On my Ruger Gunsite Scout with a full-length XS rail I was using 34MM Mediums, and it was cleaning the rear sight fine. Just measure from the top of the rail to the top of the sight and find a set of rings from the base to the bottom of the saddle are taller than that. An AR-15 QD mount is meant for clearing a scope on a flatop rail which usually needs to sit a lot higher and is probably going to make getting a cheek weld almost impossible on your rifle. Judging from the Tikka website, it looks like there is about 3/4" offest so a set of highs may work. Remember to also account for your tube size as well.