Good budget laser - VISM QR Laser Designator Box w/Green Laser Sight

This is a pretty basic, decent budget laser. I didn't get it from Optics Planet, it was a birthday gift. The laser flashes off when I fire my rifle. It doesn't seem to like the recoil from an AR15. It was off for a couple minutes and wouldn't come back on after some rapid fire. It works now. It works well to get rounds in the right general area, but I wouldn't rely on this as a primary sight.