When I started in early 60s I bought Weaver Ks. Mostly they held up and were cheaper than RF and Leuopld. I ended up with some RFs and Leupolds on trades. When Weaver sold I started buying Leupolds. Due to bad experiences with varibles I only buy straight powers. I have rifles that are 50yrs old that had a new Weaver K on them since. Still clear and holding 0.