I have a one month old G-19 Gen 4 with the correct spring and ejector. Bought brand new in the case from a very reputable, high volume dealer in Cleveland. Shot once a couple of weeks ago, 125 or so rounds no problems - cleaned and oiled per Glock. Went to the range today and shot 125 or so rounds. Removed magazine and laid the pistol down at the end with the slide back. It was a bit warm, so I went to pay and was carrying the pistol out with the slide back. Went to the parking lot and my brother pulled the slide back and released in order to look at my new sights in the daylight. I took the gun, racked the slide and the slide went forward 3 inches past where it should. I slid the slide off and a little flat spring fell out. The plastic slide release was gone. Went back in and it was laying on the shelf in the range. WTF ? Brand new gun and I never dropped it, abused it, nothing.