Precision Reflex .308 DPMS SPR Delta Top Rail System 15in Flat Dark Earth. This rail ties the upper receiver to the forearm to create a very rigid shooting platform. This rail will also give you the SPR look in a 308 package. This rail will work with New DPMS uppers. This rail is constructed of T6 6061 hard coated black anodized aluminum. The rail has a full 1913 rail across the top. Rails come with mounting screws for attachment to forearm rail. Rail is 22'' in length. This Rail is designed to work with PRi's 14''DPMS Delta forearms. Mounting this rail requires the 8.5'' rail to be removed from forearm. All mounting hard ware comes with rail. Specifications for Precision Reflex .308 DPMS SPR Delta Top Rail System: Manufacturer: Precision Reflex Color: Flat Dark Earth Fabric/Material: Aluminum Cant: 0 MOA Gun Make: DPMS Condition: New Package Contents: Precision Reflex .308 DPMS SPR Delta Top Rail System Precision Reflex 03-071-SPR-15D-DE: .308 DPMS SPR Delta Top Rail System 15in Flat Dark Earth