[5 of 5 Stars!]I was a little skeptical, but I took a chance on this light, and I am glad I did! I wanted to use it with either my Glock 35 or Glock 22 ( I use either as my primary Duty weapon) but I did not want to lay out big bucks for a light AND a special holster - a possible outlay of $225 or more for both. It fits not only on both of my Glocks and both my old and new Mossberg 500 Tactical shotguns, as both have Pitcatinny (?) rails on them.
The light and mount ride secure on my duty belt with the clip provided on the mount, and the unit slides and snugs instantly on all the firearms I bought it for. The light itself is very bright, and the fact that it makes good use of readily available AAA batteries make this one of the best accessories I have ever bought for on and off-duty use. I also wanted a good light for my Glock 35, which has the new Crimson Trace laser, but again, I did not want to spend the extra $$ on a special holster.
All around - a good decision - one that I will recommend to my brothers and sisters in blue.