SME's Vertical Fore Grip Weapon Light is a powerful 260 lumen CREE LED flashlight, with constant on and blinding strobe modes. It is made of a water resistant, durable aluminum with a quick crossbar mounting system and wingnut which allows installation and removal of the grip to any Picatinny or Weaver rails. The weapon light uses a spot focus for clear and precision target identification, two CR123 battery and has a 3.9" grip length. Oal 3.90" Type Weapon Light Color Matte Black Output 260 Lumens Proofs IPX4 Water Resistant Series Rail Mount Bulb Type Cree LED Battery Size CR123 Filter Color White