I have a pair of Alaska Arms quick detach rings. These are for a 30mm tube and are medium height. These are Ruger pattern. I know for sure they'll fit a 77/357 and the newer Mini-14 rifles. Unsure if they'll fit anything else, but those are the 2 rifles that I used these on.
New these are over $180. These have some slight blemishes, so I'm asking $140.
VERY nicely made rings. I used these so that I had a quick way to remove the optic and use the open sights in the field if I needed to. I never needed to and sold the rifles, so I no longer need these. Cash only