I've only had my G19 a few weeks now and I've noticed a few things that to me seems odd but may be perfectly normal. I'm hoping some of you Glock pros can help me out here. When I remove the slide, I notice that the guide rod and spring has partially slipped out of the groove on the barrel. Is this normal? My fear, though probably unjustified is that this same thing might happen when the slide is on the gun or during firing.