While cleaning the lint out of my carry vp9 this morning I noticed that there is a small amount of play between the slide and frame. It hasn't caused any problems and the gun runs fine. I'm just curious if anyone knows specs or what HK says about this. If you take the assembled gun and squeeze the the business end, the slide will move towards the frame about 2mm. It leaves just enough space for lint to get in between the slide and frame.