Aren't they the same ones that they ship with the Super Blackhawk Hunter?? I ended up lapping the ones on my SBHH; they were off a tad. That being said, they seem to work great...scope seems to return to zero after taking off the scope and putting it back on. Like Jim said, other makers make the Ruger-style rings much cheaper.... Think they were around $30 in the Natchez catalog.
Jim