I just purchased this sight have have a few comments. First, it does not seat on my Glock 43. The dovetail mount that came with the sight simply will not pull tight when the screws are set. I called support at the Mako Group (they distribute the sight) and was told I could file down the top of the dovetail mount to make it work. Instead, I just switched it to one of my Glock 19's and it fits perfectly (I also tried it on a Glock 20 and that works as well). I suspect the dovetail grooves on the Glock 43 may be milled to slightly different specs. As for sight performance, it's great outdoors. It took me a bit to get used to not searching for the front sight (which is no longer needed) but I soon got the hang of it. Also, the brighter the sunlight the clearer the sight picture. Indoors it's a slightly different story (for my eyes, anyway). So, I'm a bit leery of putting it on an EDC weapon but think it will make an awesome hunting sight. It will probably end up on the Glock 20.