This was a lovely addition to my Kel-Tec P3AT and performed much better than I had hoped for a side-mounted laser. It was easy to install and align. My only complaint actually pertains to the packaging - the company provided batteries were dead and they also failed to supply the proper allen wrenches. I was suppose to receive two of the 0.062 mm wrenches, but they only supplied one, and doubled up on the 0.05 wrench instead. Luckily we are well supplied with wrenches, which permitted me to finish the installation process.