Description Factory Ruger 90045 10 round magazine is what Ruger shipped with new 22/45 Mark 2 pistols.This magazine will work in Mark 3 with less drag since it has one less un-needed tooth on the top left front corner. It will work in Mark 4 with a base pad change. Click Here for our page on how to properly adjust your magazines to feed properly *NO RUGER magazine comes from Ruger perfect.
