2A Armament Builders Series Aluminum Castle Nut

2A Armament Builders Series Aluminum Castle NutThe Builder Series offers a vast number of Castle nut offers weight savings over a traditional steel mil spec castle nut. It features unique machine work to enhance the appearance as well as reduce overall weight. It is light but strong enough to keep your buffer tube secure. It is anodized with the same method as all of our components in order to keep the coloring consistent.Features:Lightweight machined 6061-T6 aluminumHard anodize finish - Type III Class 2Weight .2 ozPrecise ManufacturingLong Term ReliabilityDurable Construction