Looks like a varmint model (no iron sights). I don't think there is any disadvantage to you going with a pic+regular ring combo as suggested by ATRS. The pic rails on CZs end up being quite high over the dovetail so I suspect ATRS are correct in their assessment. That being said you absolutely have to check for bolt clearance with the occular on the CZ527, not just the objective clearing the barrel.
that being said, optics trade is a good company to deal with as well.