Fully licensed by Knight's Armament, the 13-inch URX4 KeyMod Handguard is an excellent upgrade option for your airsoft gun. With KeyMod slots positioned at seven angles around the handguard, you have the ability to position modular KeyMod accessories at a variety of angles and configurations. The top of this handguard upgrade sports a long 20mm Picatinny rail, allowing you to attach an even greater variety of accessories like lasers or magnifier optics. One of the best features of this KeyMod handguard is the integrated ambidextrous QD sling mounts. These mounts sit flush about one inch from the rear of the handguard, offering a balanced mounting position for your sling of choice. The integrated barrel nut makes installation quick and easy, so you will spend more time playing and less time hassling with your equipment.