Description WILL NOT FIT ANY 22/45 Factory Ruger 90046 10 round magazine is what Ruger shiped with new Mark 2 Standard Frame pistols. This magazine will also work in Mark 1 pistols but is 10 rnd vs. 9 rnd. For older Mark 1 (right hand follower button) you will need to swap the button to the right side. Click Here for our page on how to properly adjust your magazines to feed properly *NO RUGER magazine comes from Ruger perfect.
