This issue is new to me. I have a stock Glock 17.5. Went to the range to shoot it yesterday. Several times when taking it out of my kydex holster the slide simply fell off. It happened when the gun was empty. I've used the same holster for many competitions with a 34.5 and never had an issue. What I did was shoot a drill, take the empty mag out and replace the gun back in the holster. Then went back to the bench to reload and when removing the gun from the holster the slide would just fall off. This happened 3 times. Other than this, the gun functioned perfectly. Any ideas from anyone?