Sharps Bros. Ultra Lite Mlok Handguard Black . Made of 6061-T6 aluminum and anodized black per mil-spec MIL-A-8625F TYPE III CLASS 2. Use Barrel Nut Wrench Tool - 1.2" (30.6mm) for installation. Installation: barrel nut torque range 35-40 ft/lbs. Screws range from 30-35 inch/lbs Specifications for Sharps Bros. M-LOK Ultralite Handguard: Manufacturer: Sharps Bros. Color: Black Finish: Anodized Fabric/Material: 6061-T6 Aluminum Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Handguard Type: Free-Float Handguard Style: Quad Rail Gun Rail: M-LOK Standard Gas System Length: Rifle Length Condition: New Height: 2 in Mount Type: M-LOK Package Contents: Sharps Bros. M-LOK Ultralite Handguard Barrel Nut Hardware Anti-Rotation Tabs