The Magpul Rail Light Mount is the perfect way to mount a light source to your rifle. This light mount is designed to be mounted on the left side of your rifle at the 11 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. It is made of polymer and comes in a black finish. A textured thumb ramp is integrated to provide the user an index point, aiding consistent hand placement and light activation.This mount 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. Specifications and Features:Magpul Rail Light Mount Left Side Mount (11 o&';clock)Polymer Black Finish Includes everything needed 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