Gray Ops CNC Accessory Pic Rail - Long Black. Attaches to multiple V-Groove interface locations. Tightly and repeatably aligns to the mount. Specifications for Gray Ops CNC Accessory Pic Rail - Long: Manufacturer: Gray Ops CNC Color: Black Fabric/Material: 6061 Aluminum Gun Type: Rifle Last Chance: Yes Package Contents: Gray Ops CNC Accessory Pic Rail - Long Screws Gray Ops CNC GO-PICLONG: Accessory Pic Rail - Long Black