IMO, your best best are Talley's. I've gone through the Sako Optilocks, Warne's and Conetrols. The Optilocks are heavy, pricey and often hard to find. They work fine and I did like the polymer inserts. The Warne's DID NOT fit the dovetail well and did not hold. The Conetrols are very nice, expensive and took a lot of fitting to get right. They look great when done however. The Talley's slid on, tightened down and have been great. If you are interested in the Optilocks, I have low and medium height rings plus the bases I'll sell for a very reasonable price. Good luck.