The X6 is the untimate arms accessory, ensuring maximum accuracy and stability during the toughest workout of your weapon. Mounts on the front sight to maintain zero better than any existing rail system on the market. National Tactical Officers Association member tested and recommended. FEATURES: - 4 MIL-STD-1913 rails on the handguard and 2 additional mini rails on the front sight. - Markings on rails assist in remounting accessories to the same position. - -Constructed of billet aviation aluminium. - Includes 2 long rail covers and 6 short covers. - No gunsmithing required. Manufactures Website Address www.commandarms.com Warranty Information