I picked up a new G26 today. I guess I now have a Glock collection. (G19 & G26). I noticed a difference between the G19 and G26 when I was checking out the G26. I will try to explain what I noticed, but it may be difficult to explain by words. On my G26, I noticed that if I push straight down on the chamber area of the barrell (with the slide forward in the ready to fire position), the chamber area moves down about 1mm. At the same time, the slide moves back about 0.5mm. My G19 does not do this. Is this a concern? I am fairly new to Glocks, so I am not sure if this is an issue.