Sightmark 30mm/1-inch Medium Height QD Mount

The idea of a quick disconnect mount can be pretty attractive, especially for optics that are frequently moved from one platform to another, like night vision scopes. I bought a pair of these to go on a Photon XT night scope, which is also made by Sightmark. I mounted 30mm rings on a 30mm tube and tightened the screws to the specs recommended by the manufacturer, everything should be legit, right? Nope. On each side of the scope rings are three screws, that when tightened secure the two pieces of the ring together, therefore clamping the scope securely between the two halves. What actually happens with these rings is that the metal around two of the three screws on each side breaks. This happened to both sides of both rings. There's enough tension with the remaining screw to keep the scope mounted and appear functional. I put a few boxes of shells through my rifle, thinking I had a mounting base issue or a problem with the scope. I learned the hard way. Don't waste your time with these rings. Move on a buy a quality set.