NcStar VISM Blue Laser (2 Mount Styles)

Not the best reviews:
QR -

Regular Mount -

Not very many reviews on each; looks like many have a problem with it not really turning off.

I’m amazed that the switch would be the biggest complaint. The blue end of the spectrum is notoriously hard to see even in dim lighting. It would be more of a novelty to play with in the dark . This would be a terrible sight on a firearm. If you want a good laser for daylight buy a green one (also fun to play with in the dark). Hard to believe they’re sold out already.