Nightstick TCM-550XL Compact Mounted Weapon Light - The TCM-550XL Compact Weapon-Mounted Light 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 weapon light features completely ambidextrous and intuitive rear-facing toggle switches on each side of the light to operate the momentary-on and constant-on lighting modes. The housing of the TCM-550XL is constructed from aircraft-grade 6061-T6 Aluminum with a polymer rear housing. Includes four handgun-specific modular rail inserts (pre-configured with C1 insert for Glock pistols), two spare Allen screws, an Allen wrench, and one CR123 Lithium battery. LED technology Ambidextrous rear-facing toggle switches Momentary or constant-on flashlight Aircraft-grade 6061-T6 aluminum housing Type III hard anodized finish Sharp, focused beam rated at 136 meters Waterproof Impact & chemical resistant Serialized for personal identification 1 CR123 battery (included) Limited Lifetime Warranty