I have a LaserMax LMS-UNI-G (green laser) on my Glock 20SF Longslide project.
Incredible..one word to describe it.
I've shot 400 rounds of high pressure 10MM..still works fine. If I remove it for any reason, the point of aim is the same when I reinstall it. I like that.
I am not impressed with anything else.
(the veridien had some issues on one YouTube test I watched).