I went and looked at PSE's web site and they do not even offer a base. They have rings and such, but no bases. If you look at the bows they now have they look to have a weaver style base on them. May get lucky and just pull the peep off and put some rings on. I would try and find a PSE dealer and get some info from them. Also if the bow is real old it may not have a scope base for it if it is older then when scopes became popular on CB's.