HiLight P20 2017 Edition Max 500 Lumen Dual Switch Quick Release Pistol flashlight/w Strobe for Glock Series, Sig Sauer, Smith & Wession, Springfield, Bretta, Ruger, and Heckler & Koch, etc. Super Bright Max 500 lumens with Cree XM-L2 LED with a 16340 battery Steady-on/Strobe 300 lumen with a CR123 battery (included) Steady on/Strobe modes with runtime of 50 minutes Quick detachable weaver mount fits most 4" to 5" barrel handguns with rail Dual side switches allowing Steady-on or Strobe with one click