The Taran TactIcal Innovations (TTI) sights are good sights and I use them on several guns, including the guns I use to compete in GSSF. The one benefit of the TTI sights, compared to the Dawson sights, is that the TTI sights are Ion Bonded, so they are more corrosion resistant. The downside of the TTI sights is that one size fits all. The benefit of the Dawson sights (which I also use on several guns) is the ability to customize them in terms of size, but they are parkerized and more prone to showing corrosion over time. A light coat of oil on the sights and you won’t have an issue. Another benefit of Dawson sights is that if you use their recommendEd heights and your gun isn’t hitting POA/POI, you can get a replacement front sight for free to get your gun zeroed. Vogel Dynamics also makes sights for the GLOCK, which are similar to the TTI sights, but Vogel uses a wider rear notch and his sights will print a little higher on target than the TTI sights.