Just bought a brand new Glock 21 gen4 (which I absolutely love!!!) and noticed that it has a bit of slop in the slide/frame fit. My 19s, 26 and 23 are all solid with very little play so kind of odd. Anybody else notice this on theirs? Have to say though if I could only own one I'm pretty sure this would be it. The new grip is pretty incredible for medium size hands.