I wish I knew the answer on what is available in 2021. I have a fixed power 4x Burris Supreme that has never moved. I wish I had bought more back in the time. Not a PosiLock but not dialing either. At the time I got it (30 years ago or so) I thought it was heavy compared to other 4x but it is solid as a rock. The clarity is amazing in my opinion. If I knew the 4x Kaps (German) was as durable I would order some. Newer variables are all much heavier for those that others report as durable and dependable. Tis the times we live in.
