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I have them on 5 of my Glocks. One pin backed out one time, re set it and have not had that problem. I have readjusted the sights a few times, after removing them. Twice I've realigned them because they moved an inch or so (which in real life won't matter much.) I still check them have them set the length of my hallway 34 feet! Set to my sights. I can move the dot by varying my grip...again just an inch or so. I have a few thousand rounds through 3 of the guns already. No problems, other then above. I wish I could buy a set for my G20! I have them on everyone of my carry guns, love them.
PS wait until you shoot them at night, amazing! Shooting from the hip a 2" 27 shot group! My buddy had sold me the G26 and felt really sad after he saw what it was capable of!
Last edited by AZBru88; 09-05-2010 at 14:17..
Reason: added info
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