Gb800m - Beamshot Compact True Daylight Green Laser Sight with M1 Mount

Great buy for the money. As said above the colder temperatures do effect the green lasers more than red. So if you're planning an arctic moose hunt you may want to consider other options, however don't let this fool you into another more expensive laser. Any electrical equipment has "optimal" operating temperature and this doesn't speak to quality or craftsmanship. If you're looking for a solid go to product for your handgun or rifle, you can't beat the visibility of green day or night for this price!
Pros: Easy to install, pressure switch included, 1x 3volt battery, nicely packaged in hard case.
Cons: May encounter cold weather operating issues. Limited to full size handguns with picatinny rail system.

This review was written in the old system and had content requirements that are different than reviews written today.