The White Label Armory AR15/AR10 Castle Nut 5 Pack delivers a reliable, steel construction solution for AR platform builds and maintenance, combining durability with precise fit and function. These castle nuts from White Label Armory are designed to pair seamlessly with both AR15 and AR10 upper receivers, providing secure, long-lasting torque retention essential for dependable operation in field, range, or tactical scenarios. A five-pack offers ready-to-go versatility for multiple builds or spare parts projects, enabling quick assembly and efficient maintenance across multiple rifles. The steel construction delivers rigidity and corrosion resistance, helping to maintain proper headspace alignment and reliable barrel nut engagement under use and exposure to the elements. Whether youre upgrading a factory build, completing a custom rifle project, or performing routine maintenance, these castle nuts support consistent clamping force and stabilized upper receiver configuration, contributing to repeatable accuracy and safe handling. From routine field maintenance to serious rifle builds, White Label Armorys castle nuts are the practical choice for builders and gunsmithing enthusiasts seeking dependable, readily available components that integrate smoothly with standard AR hardware and accessories.