Fenix ALG-18 Barrel Mount offers a fast and straightforward solution for mounting flashlights to rifles that lack rail attachment points. Securely attach the mount to any gun barrel with an 18-23mm diameter without requiring extra tools. This mount is built with A6061-T6 Aluminum and possesses a Type HAIII hard-anodized finish for greater durability. It works with most Fenix flashlights with a body diameter of 23.5-28mm.