Precision Reflex Winchester FN Short action Step Down Nignt Vsion Rail w/ 25 MOA 8-40 Screws Black. Base is constructed of T-6 7075 hard coated black anodized aluminum with a full 1913 rail. Base is 16" long and comes with #8-40 screws for mounting base. Rail has side mounting holes for adding side rails in the future (not included). Specifications for Precision Reflex Winchester FN Short action Step Down Night Vision Rail: Manufacturer: Precision Reflex Color: Black Finish: Anodized Fabric/Material: Aluminum Quantity: 1 Gun Make: Winchester Gun Rail: Picatinny Package Contents: Precision Reflex Winchester FN Short action Step Down Night Vision Rail Precision Reflex 02-218-08C: Winchester FN Short action Step Down Nignt Vsion Rail w/ 25 MOA 8-40 Screws Black