The TCM-550XLS Compact Tactical Weapon Mounted Light w/strobe 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 momentary, constant-on and strobe lighting modes. The housing of the TCM-550XLS is constructed from aircraft-grade 6061-T6 Aluminum with a polymer rear housing. Includes four modular rail inserts (pre-configured with C1 insert for Glock pistols), 2 spare Allen screws, Allen wrench and CR123 battery.