This is a solid set up on my early model L579. Clean look and set up easily. But since it only tightens from one side, you need to be sure that both ring mount are in line with each other to avoid torquing your scope. But if you are careful, no problem.
Pros: Solid set up
Cons: Need to be careful not to misalign
This review was written in the old system and had content requirements that are different than reviews written today.