The LGC-550XL Long Gun Compact Weapon Light is designed specifically for rifles and carbines with Picatinny rails. It uses a super-bright LED rated at 550 lumens working in conjunction with a precision-engineered total internal reflection (TIR) lens to create a bright white beam of light rated at 136 meters. This 2.5-ounce flyweight weapon light features completely ambidextrous and intuitive toggle switches designed for support hand operation with a simple push down for momentary-on and constant-on lighting modes. Ideal mounting locations include the top or side rails for easy reach and activation. The housing is constructed from aircraft-grade 6061-T6 Aluminum with a polymer rear housing. Includes one CR123 Lithium battery.Specifications: Xtreme Lumens: Yes Flashlight Lumens: 550 Beam Distance: 136 m Candela: 4612 Drop Rating: 2 m Dust/Water Rating: IP-X7 Waterproof Flashlight Runtime: 2.5 hrs Switch Function: Momentary or constant-on Length: 2.5 in (60 mm) Width: 1.1 in (30 mm) Depth: 1.2 in (31 mm) Weight: 2.5 oz (70 g) Light Source: LED Body Color: Black Quantity of Batteries: 1 Power Source: CR123 Package Contents: Light Allen Wrench (1) CR123 battery US Patent: 9713217 Warranty: Limited Lifetime