Hello! I have gone to a few matches and have seen some rings that I believe are made by Marv Pearson and would like to buy a set for a Sako Finnfire. I don't know much about them, but they look pretty solid and seem to work very well. If there is an MOA adjustment built into them that would be great. If there is anyone out there that may be able to help me out or that might know an alternative option, it would be greatly appreciated.