The X5L mounts on any accessory rail. The forward pin (top) fits in the rail's cross slot. The exposed adjustment screw (center) tightens the rail.

My only complaint has to do with the X5L's switches. They are very small and difficult to feel, which could cause some difficulty in high-stress situations. They are also a tough reach for my small hands and short fingers.

My taller friends fared better, but they weren't crazy about the switches either--agreeing they should be bigger and easier to reach. If possible, I would like to see the switches on the back of the light.

My ergonomic complaints aside, the X5L is an excellent tool. It is light, well-constructed and gives users in need of a light and laser a tool that meets their needs. And, unlike most of their competitors' lasers, the Viridian works as well under bright lights as it does in the dark.

For those of us who see the benefits of weapon-mounted lasers and lights, the 24-hour-capable X5L is a must-have.