Streamlight PolyTac LED Flashlight with Magpul Rail Light Mount (LEFT Side Model) C4 LED 2-3X brighter than High Flux LED! 4,800 candela peak beam intensity; 120 Lumens Attaches to any Picatinny /Mil Spec or Weaver Rail Run time up to 3 hours Tailcap push button provides one-handed momentary or constant "on" operation. Magpul Rail Light Mount, It positions the weapon light high and cantilevered forward, at the 11 o'clock position, to allow a more forward support hand position, keep the light tucked in close to the bore, and to minimize barrel shadow. A textured thumb ramp is integrated to provide the user an index point, aiding consistent hand placement and light activation.