Surefire XR1, Rechargeable Weaponlight, Fits Pistol and Picatinny Rails, 800 Lumens, Anodized Finish XR1-A The latest pistol mounted light from Surefire features the lightweight and rugged design that Surefire is renowned for. This light has 600 Lumens and can mount to most universal and picatinny rails. Powering the light is Surefires new rechargeable battery system" allowing the user to charge virtually anywhere with the included Micro USB charging cradle. Or keep a spare battery with you and always have the illumination you need.