Ultra-Rigid Design Made to Minimize Handguard Flex - Made to reduce point of impact shift with popular lasers such as ATPIAL DBAL NGAL - 4140 Steel Heat Treated Barrel Nut- 2.250 Long - Barrel Nut and Wrench Included - Features Patented 4140 Heat Treated Torque Plate - 13.5 Top rail length - 14.1 oz Installed Weight - 6061 Aluminum Type III Hard Coat Anodized - Continuous MIL-STD 1913 Picatinny Top rail - Two Integral Anti-Rotation QD Sling Sockets - Super Slim 1.5 Outside and 1.250 Inside Diameter - Seven Sides of M-LOK - 5-Slot Polymer M-LOK rail included - Fully Dehorned and Deburred - 100% Made in USA - Keeps America Working - MI Lifetime Warranty