Looks like part of the gun - Lasermax Centerfire Laser Series Red Laser Sight For Beretta Nano

I haven't taken it to the range yet, but my initial impression based on fit and feel is positive. It was a little tricky to install as you have to press firmly to snap it on and I didn't want to break anything. I chose this over the CT mainly for the price and I didn't like the little hump switch on the CT. It takes up too much of what little grip there is and looks uncomfortable.