Constructed of heat treated hard coat anodized Military Grade T6 aluminum. Rail locations at 45 degree increments around forend. Position rails to exact location along length of forend. Features ATI's new Dovetail Rail System (rails not included). Forend included in this package is only compatible to Mossberg shotguns with a removable forend, any Mossberg Shotgun newer than 2006 should be checked to insure that it has a removable forend. Built-in Heat Shield. Over 70 swivel stud locations to choose from.