I've owned various lasers including grips and rail-mounted compact models, but this is the only one that's completely integral to the gun! Once you install it, it's out of sight and mind, until you need it. It's great that I can have my laser while still keeping rail space for a flashlight and I can use my own grips. This came precalibrated for my Glock and needed no adjustments once I installed it. It aims straight and true, right out of the box! My only con is that it took a novice like me about 15 minutes to install it. There are good videos online showing the installation process so I highly recommend watching them first to save yourself some time. Other than that, I have absolutely no complaints about this laser! I couldn't be more happy with it.
Pros: Integral design, Bright, Factory Calibrated
This review was written in the old system and had content requirements that are different than reviews written today.