I’m the Chief Training Officer at Shoot Indoors Denver. 100% endorse this slide. It was simple to switch from my factory Glock slide to this. Did not have to do any modifications. I bought this slide bc obviously the gen 3 doesn’t have an RMR cutout and I wanted to add my SWAMPFOX Justice 1x27 red dot and it’s perfect. I researched different slides in addition to having my factory slide milled out. The best price was $150 and that was to have my stock slide milled. For the money this was by far my best option (I now use my factory slide as a backup). I have only had it for two weeks and have only run 250/300 rounds through it. But have yet to encounter an issue and the cerakote looks perfect. Still need to get suppressor high sights, so can’t speak to how iron sights fit. If you in the market for a red dot… check out SWAMPFOX!! Holosun sucks! SWAMPFOX ALL DAY.