Description: Madbull Knight's Armament Airsoft 13 inch URX 4 Keymod Rail MadBull Airsoft, working alongside with Zshot Airsoft, is proud to present to you the KAA (Knight’s Armament Airsoft) URX4 forend Handgaurd. The URX4 rail is a unique accessory because of its integrated barrel nut and replica gas block tube, which are both simulation to real forms. Officially licensed by Knight’s Armament, it adds a variety of keymod accessories options as well as component placement for different angles. The Airsoft version is made out of anodized aluminum for a more serious feel and appearance. Package includes - 1 x URX4 13” Rail Features - Keymod system for variety of accessories - Integrated Barrel nut - Replica gas block tube for enhanced realism - Smooth textured matte black finish - Component placement for various angles - User friendly mounting Keymod accessories.