The GG&G Under Foregrip Rail for AR-15 Rifle Forearms is designed to attach to AR-15 rifle length handguards. The rail is installed into the bottom vent holes of the handguard without removing the handguard from the weapon. The unique integral camming attachment system allows the rail to be easily installed and removed with a flat tip screwdriver without any alteration to the handguard. Made from 6061-T6 billet aluminum alloy and hardcoat anodized. Length of 5" and weight of 1.9 oz. Made in the USA.