Good little laser - Crimson Trace Laserguard Laser for Glock 42 and Glock 43

Installation took a moment to figure out, but it works well and is unobtrusive. As soon as I installed it I was able to hit 20 oz bottles at self defense distances, so it's on target right away. One downside is that there's no easy way (that I can see) to disable it for training with the sights. So when I go to dot hat I'll just have to take the battery out while I'm training.