I have three of these that I use on t/c and bullberry barrels in calibers from .17 mach2 to .375jdj. I frequently swap scopes/sights for hunting/match shooting and this product has proven to be durable in all respects. I use Loctite blue for installation.
Pros: Strong, precise, simple installation
Cons: None
This review was written in the old system and had content requirements that are different than reviews written today.