The White Label Armory AR15 Extractor O-Ring 10-Pack enhances the reliability of your bolt carrier group by improving extractor tension and performance. Designed to Mil-Spec dimensions, these O-rings fit over the extractor spring on all standard AR15 bolts to ensure consistent extraction in demanding conditions. Made from high-quality materials and 100 percent American-made, this pack provides essential spares for maintenance, ensuring dependable operation with every cycle.