Midwest Industries

4140 Heat Treated Barrel Nut - Barrel Nut and Wrench Included - Features Patented 4140 Heat Treated Torque Plate - 10.50 overall length - 8.8 oz Installed Weight - 6061 Aluminum Type 3 Hard Coat Anodized - Continuous MIL-STD 1913 Picatinny Top rail - Five Integral Anti-Rotation QD Sling Sockets - Super Slim 1.5 Outside and 1.3 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