I have a Glock 19 for CCW. I also do a little combat shooting. My understanding is that these sights are very fast and practical for real world situations. Not a precise sight for distance target shooting. Anyone has experience with these sights? Would the Standard Dot provide more precise grouping and still fast target acquisition? It would be good if either sight permitted a shooter to group within the high score of the target at 20 yards, assuming one shoots that well with factory sights. Any experience with these sights?