Streamlight PolyTac LED Flashlight with MSP Offset Mount 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 Includes: Mounting Solutions Plus (MSP) 1" Offset Ring Flashlight Mount