Don't buy Redfield rings
They were made in China up until recently when they switched back to having them made in the US.
They also aren't under Leupold but are a seperate company in Onalaska, Wisconsin. Not part of Redfield scopes.
I had a set of Ruger 77 Redfield rings and was carefully snugging up the clamp screw and the head popped off. I'm a retired metallurgist and the fracture surface looked just like other fracture surfaces I've seen on fasteners made in China. Junk.
I imagine there's still alot of the Chinese inventory floating around.