The Rail Light Mount fits on any standard 1913 Picatinny Rail and integrates with the Magpul XTM panels. It positions the weapon light high and cantilevered forward, at the 1 o'clock position, to allow a more forward support hand position, keep the light tucked in close to the bore and to minimize barrel shadow. A textured thumb ramp is integrated to provide the user with an index point. Includes everything you need to mount Surefire 300 and 600 series Scout Lights, 1913 Picatinny attachment pistol lights and all light bodies from 0.75 to 1.03 in diameter via the included set of anodized aluminum mounting rings.