The Fenix ALG-18 barrel mount is a functional accessory helps to perform tactical/hunting application; which suits for weapon barrels ranging from 18 - 23mm. The compatible flashlight body diameter ranges from 23.5 - 28mm with a light head diameter less than 70 mm. Made of durable and high-strength aluminum, the easy operation effectively assists in tactical/hunting scenarios.The Fenix ALG-18 barrel mount is a functional accessory helps to perform tactical/hunting application; which suits for weapon barrels ranging from 18 - 23mm. The compatible flashlight body diameter ranges from 23.5 - 28mm with a light head diameter less than 70 mm. Made of durable and high-strength aluminum, the easy operation effectively assists in tactical/hunting scenarios.