The VFC FNC GBB Airsoft Top Rail is a much-needed modern accessory solution for the late Cold War styling on the Cybergun FN FNC gas airsoft rifle by VFC. This is a first-party part made by VFC and is made of high-quality CNC aluminum alloy construction. With this top rail, you will be given the ability to mount Picatinny accessories such as lights, lasers, and optics.