Ooh, lots of conjecture and speculation on this one. The most famous is likely the Hensoldt 4-16x56. Schmidt also has their ultra bright with 56mm objectives. I’m going to go out on a limb and say that most mfr’s think it’s too risky and believe there is not enough market for it. Hopefully the Steiner T6Xi 3-18x56 encourages other mfr’s to venture into the realm of sub $3k options as they make for great crossover designs, just need the proper reticle.