Gostovp,
You're a good shot. I don't have a Glock 19, but I've shot it and it certainly shoots much better for me than my 9mm Shield. Although YMMV, I wouldn't recommend the Shield to a beginner. I finally got to the point where the Shield is accurate up to 15 yards. The Shield still does not work well for me at 25 yards. Nevertheless, I going to put some of Trijicon's HD RX sights on it as soon as I receive authorization to purchase a Sig Sauer P320.
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