I prefer these over all others, Spuhr, Seekins, etc. all make great rings but the one bolt design of the ARC's just make them really easy to work with. And the torque between the tube and rail being the same at 55 in-lbs makes it really easy, you can buy a $35 Borka torque wrench and essentially have a "quick" release system. I've never had an ARC ring set mar up any of my scopes.