MI NIGHT FIGHTER M-LOK HANDGUARD 10.5" BLK 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 10.5" Top rail length 12.4 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