The Redline Selection of the Strike Industries Megafins XL is now available... "The Mega Fins-XL Handguard Line is the latest and greatest rail from Strike Industries. SI is finally offering a wider handguard rail system available in both M-Lok and Key-Mod versions ranging in lengths 7-inch, 10-inch, 11-inch, 12-inch, 15-inch, 16.25-inch and 17-inch! All lengths except the 7-inch model feature an integrated, adjustable; flip up front sight, which folds down flush to the rail for the ability to still mount over if desired. With an internal diameter of 1.51-inch you can run recessed suppressed or have room for larger diameter muzzle devices if needed. The Strike Industries Mega Fins XL is the ultimate addition to the AR product line!"