The M3 LED is now equipped with a more powerful LED for greater illumination and longer run time. It features a patented Slide-Lock interface for easy tool-free mounting and dismounting to the firearm rail and a limited lifetime warranty. With a peak output of 125 Lumens and runtime of 120 minutes, its no wonder that the M3 has been the gold standard in weapon-mounted illuminators since it was first introduced in 1998.