After owning this particular Viridian laser/w light module for over 2 years, I probably wouldn't go back and purchase another one.
The module has been mounted on my home defense gun since the day I got it. I took it out the the range on a regular basis and practiced night shoot with it. What I like about this laser/light combo is that it is really compact and the laser and light are both really bright. Viridian also made a special holster for the module. It is decent quality.
Let's talk about some of the issues I have had with this module. 1. It is difficult to replace the battery. If you are not being really careful, it is easy to ruin the threads on the battery cap. Once that happens, your module becomes useless. 2. Occasionally, the laser would fail to turn on. I had to remove the battery and put it back for it to work. 3. After using it for over a year or so, it started to have problem when I switch to the modes which both laser and the flash light are enable at the same time. It would work for a few seconds then it would just shut off. I thought it was battery issue, so I have tried it with a few brand new batteries and the issues persists.
Pros: Small size, light weight, easy mode switch
Cons: Hard to replace the battery, problem using both laser and light at the same time
This review was written in the old system and had content requirements that are different than reviews written today.