Very solid 4-screw design. Mounting block/screw is spring loaded with protusion that fits into slot of rail because mounting screw is internal. Also has set screws on rail ring to lock against scope tube which are not really needed, but does show some design thought. Fit & finish exceeds anything I've seen from Leapers.
Pros: Unique features
Cons: Rails cannot be swapped to opposite ring
This review was written in the old system and had content requirements that are different than reviews written today.