BUT--oddly enough, I have one aftermarket mag that won't lock the slide back on my P89 that WILL lock the slide back on my P95. Can't quite figure that one out. It feeds perfectly in either gun.
I thought Ruger changed magazines on their newer P-89's so that the older hi-capacity magazines they made for the p-85 and older P-89's wouldn't work on their newer 9mms.