Bkl 30mm low rings - BKL Technologies Model 303 0.6in Long Dovetail Rings

These BKL rings are perfect for my needs. They are slightly adjustable in width for either 3/8 or 11mm dovetail rails but they also fit the old Davidson benchrest style bases perfectly. The difference is when used with the Davidson bases they take a deeper seat than on the much shallower dovetail rail which is a good thing when there is some recoil.
I like them so much I bought 2 pairs and they work perfectly in both applications.