Having a problem with a new g20sf. Empty mags on a closed chamber are sticking in the gun. When I push the mag release the triangular extension on the slide stop that catches the follower will skip to the side of the follower as the whole mag/follower moves to the right. I can replicate this pretty reliably with the 2 mags that came with the gun, but not the third mag which was bought separately. All three are gen3 mags. Any known issues? Is this worth contacting glock about or should I wait for my extended slide stop/release to get here and see if the problem is solved? Thanks, all. I'm hooked on the g20, bought this on my mid-tour leave and got to put about 500 rounds through it. If only I could take it back to Afghanistan with me!