PumpGunGuy Posted February 17, 2015 Share Posted February 17, 2015 I put some GL101O sights on my G17, and went to the range. I was disappointed to see that my POI was about 4" high at 20 yards. I asked another experienced shooter to shoot my gun, thinking I might be doing something terribly wrong, and he had the same result. My load is 5.0 grains of Power Pistol with a 124 grain Montana Gold RN or JHP depending on what is available. When I called Trijicon, I was connected with a marginally competent customer service rep who confirmed my calculation that I need a 0.035 inch taller sight, which they have available as a non-catalogue item. It costs $79 with an additional $10 shipping charge. She did inform me that I could have exchanged it if I had not installed it. I don't know how I was to deduce this need without installing the sight first. Has anyone else had a similar problem? If so what did you do about it? Thanks for looking. Link to comment Share on other sites More sharing options...
JBP55 Posted February 17, 2015 Share Posted February 17, 2015 How does it shoot with factory ammunition? What is the height of the front and rear sight above the slide? Link to comment Share on other sites More sharing options...
45 Raven Posted February 17, 2015 Share Posted February 17, 2015 To make that kind of correction and to keep the front sight matched with your rear, you likely don't have many options. I would contact Trijicon again and see if I could speak with someone else about this issue. You are correct - kind of hard to know where the POI is going to be until you install the sight! Sometimes the calculated POI is not the same as the actual POI, and I have noticed this to be especially true with Glock 9mm pistols. Dawson Precision is really good about helping when you need a different height sight. See their "Perfect Impact Promise" on their website. Link to comment Share on other sites More sharing options...
RaeLane17 Posted February 18, 2015 Share Posted February 18, 2015 I recently had the same issue. I swapped the .215" front sight with the .245" trijicon HD sight. It's spot on now. POA=POI I'm very happy now. Link to comment Share on other sites More sharing options...
BoyGlock Posted February 18, 2015 Share Posted February 18, 2015 Can you file the rear sight top to lower it a bit? Link to comment Share on other sites More sharing options...
eggman Posted February 18, 2015 Share Posted February 18, 2015 I use Warren rears and either Warren or Dawson front FO sights on my G17's /G19's and had to go to .245" front height instead of the suggested .215" . I have one Gen 3 G19 that I'm thinking of trying a 10-8 precision .250" FO front as I'm still high at 25 yds with 124 gr. bullets. The only Glock I own that was able to use the suggested .215" front was a G22 Police trade-in I bought . Rodney Link to comment Share on other sites More sharing options...
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