Precision Reflex Recce Rail Flat Dark Earth. The rail has Mil standard 1913 rail across the top and is 11.5in in length. Specifications for Precision Reflex Recce Rails: Manufacturer: Precision Reflex Finish: Hard Coat Anodized Fabric/Material: Aluminum Cant: 0 MOA Gun Make: AR Platform Gun Model: AR-10 Length: 11.5 in Width: 1.35 in Height: 0.45 in Weight: 6.2 oz Condition: New Package Contents: Precision Reflex Recce Rails Precision Reflex 05-0065-DE: Recce Rail Flat Dark Earth