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.