When your tactical activity takes you to low-light situations, the black TLR-1 HL Rail-Mounted Weapon Flashlight from Streamlight provides the illumination you need to be effective. Designed for use on long guns, this weapon light attaches to a Picatinny or Glock rail by means of a thumb screw – no tools required – and comes with keys for compatibility with Beretta 90two, S&W 99, and S&W TSW rails. It emits a 1000-lumen beam, concentrated by a total internal reflection optic and digitally regulated for consistency across the life of its batteries. The light is activated and deactivated by its onboard ambidextrous, momentary/constant-on switch. Its strobe setting can be enabled or disabled according to your needs. The light is powered by two included CR123A batteries, which provide 1.5 hours of runtime.