AT3 Tactical Mil-Spec AR-15 Pivot Pin FDE. Its made of 8620 Alloy steel and has a Black Melonite finish. Also available in other colors (Cerakote). All AT3 Tactical lower receiver parts meet or exceed Mil-Spec. These parts are guaranteed to fit and function in your AR and are perfect for replacing lost or damaged parts. Specifications for AT3 Tactical Mil-Spec AR-15 Pivot Pin: Manufacturer: AT3 Tactical Finish: Melonite Condition: New Fabric/Material: 8620 Alloy Steel Package Contents: AT3 Tactical Mil-Spec AR-15 Pivot Pin AT3 Tactical AT3-Pivot-01-FDE: Mil-Spec AR-15 Pivot Pin FDE