Volquartsen MKIV 22/45 Mag Release plus 5 Magazine Base Pads- The ultimate competitors edge! Our new Extended Magazine Release for the MKIV and a 5-Pack of MKIV 22/45 Magazine Base Pads. The new Mag Release allows magazines to sit a little higher for better and more reliable feed. And the CNC machined, anodized aluminum Base Pads make magazine insertion and removal quicker and easier... For Lightning Fast Reloads!- The Base Pads will work with factory magazines and will also convert any Ruger MKIII magazine into a Ruger MK IV 22/45 magazine.- The MK IV Magazine Release improves feeding by preventing the bolt from sliding over and missing the round in the magazine. It's also knurled for both aesthetics and feel. Our release will work with the factory magazines however due to magazine being raised, it is highly recommended the Magazine Release be used in conjunction with our Magazine Base Pads. Please note that when our release is used with factory magazines and basepads that the magazine will sit just past flush on the bottom of the frame.