The White Label Armory AR15 Firing Pin Retaining Pin 10-Pack provides reliable, Mil-Spec components for securing your firing pin in standard AR15 bolt carriers. Unlike common cotter pins, these are precision-machined and properly formed for exact fit and consistent retention. Each pin is phosphate coated for added durability and corrosion resistance. Perfect for builders, armorers, or maintenance kits, these 100 percent American-made pins ensure dependable function in every build or repair.