The TCM-550XL Compact Tactical 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. The weapon light features ambidextrous, intuitive rear-facing toggle switches on each side of the light to operate the momentary-on and constant-on lighting modes; serialized for personal identification and constructed from Aluminum with a polymer rear housing. Includes four modular rail inserts (pre-configured with C1 insert for Glock pistols), two spare Allen screws, Allen wrench and CR123 battery.