The MecGar 17 round magazines with the MecGar plastic +2 extensions are a very sweet package, even here in Canada where we are still stuck at 10 rounds. The base pads make it much easier to load the magazine quickly. The MecGar magazine tube is the perfect geometry and coating, extremely resistant to fouling, getting out of shape in the body or the lips, and the coating is super slick so the rounds feed very well.