USED Midwest Industries Combat Rail One Piece Free Float M-LOK Handguard 8in 6061 Aluminum Type 3 Hard Coat Anodized Matte Black MI-CRM8. 5'' Outside And 1.3'' Inside Diameter. Seven Sides Of M-lok. 5-slot Polymer M-lok Rail Included. Fully Dehorned And Deburred. Specifications for Midwest Industries Combat Rail One Piece Free Float M-LOK Handguard: Manufacturer: Midwest Industries Color: Matte Black Finish: Type III Hardcoat Anodized Fabric/Material: 6061 Aluminum Gun Make: Universal Gun Model: Universal Gun Type: Rifle Handguard Length: 8 in Handguard Type: Free-Float Gun Rail: Picatinny Gas System Length: Mid Length Weight: 7.3 oz Inner Diameter: 1.3 in Outer Diameter: 1.5 in Country of Origin: USA Mount Type: M-LOK Features of Midwest Industries Combat Rail One Piece Free Float M-LOK Handguard 4140 Heat Treated Barrel Nut Barrel Nut and Wrench Included Features 4140 Heat Treated Torque Plate Continuous MIL-STD 1913 Picatinny Top rail Two Integral Anti-Rotation QD Sling Sockets Super Slim Seven Sides of M-Lok 5-Slot Polymer M-Lok rail included Fully Dehorned and Deburred Package Contents: Midwest Industries Combat Rail One Piece Free Float M-LOK Handguard Midwest Industries MI-CRM8: Combat Rail One Piece Free Float M-LOK Handguard 8in 6061 Aluminum Type 3 Hard Coat Anodized Matte Black