Just this last weekend I purchased a Glock 30 AND a Glock 26. (My wife and I are recent recipients of TX CHL's!) We went to the shooting range that evening and shot these two polymer wonderpistols. The 26 was sweet and never even hiccuped. The bullets impacted exactly at the point of aim. Wonderous little thing. The 30 was a delight as well to shoot. Recoil was light, and the bullet holes were also right on target (one ragged hole at 7 yards and just a little bigger at 15 yards). Only problem was the 30 couldn't seem to lock the slide back when the magazine was empty. I went home and cleaned the gun and played with the empty magazines for a few minutes. I inserted the magazine and cycled the slide 25 times, only twice did the slide lock back. The other magazine was about the same. Every thing looks intact and in good order as far as the slide catch goes. Has anyone experienced this same problem? Was there a bad run of mags for the 30? Of all my Glocks I have never had a problem. I am still waiting for a call from Glock customer service.