Light weight, free float, billet aluminum, modular mount AR-15 / M-16 handguard system. The versatile and attractive Viper Rail, gives the shooter a slim line handguard that easily allows a 360 degree grip around the circumference of the body for most hand sizes. The system is has mounting locations on the 90, 180, 270 degree positions for the 8.5_ unit, and has mounting at 0 (on the interrupted section), 90, 180, and 270 degree position on both the 12.5_ and 14.5_ rails. The system mounts to any Military Standard barrel nut, and has two anti-rotation tabs to prevent the rail from rotating. Specification sheets will be available soon. Current rail will not work with a suppressor without interference. Includes X Product's Lifetime WarrantyImage may not be representative of color or style.