Precision Reflex PRI 5.5in Rail Forearm Flat Dark Earth. Rails have a 2in radius couture cut on bottom side to mate up with 2in tube. Rails are constructed of T6 6061 hard coated black anodized aluminum. The rail comes with 2 mounting screws and bar nut for installing. Rail weighs 1.1 ounces. Dark earth finish. Specifications for Precision Reflex PRI Rail Forearms: Manufacturer: Precision Reflex Color: FDE Finish: FDE Cerakote Fabric/Material: Aluminum Gun Rail: Picatinny Cant: 0 MOA Gun Type: Rifle Gun Make: AR Platform Quantity: 1 Handguard Type: Free-Float Package Contents: Precision Reflex PRI Rail Forearms Precision Reflex 05-070-05DE: PRI 5.5in Rail Forearm Flat Dark Earth