Product OverviewThe Advanced Technology A5101020 AR-15 Castle Nut is a mil-spec steel castle nut designed for AR-15 and AR variant buffer tubes. This durable component is virtually indestructible, ensuring a secure attachment point for your buffer tube. It is crafted to fit most AR-15s and offers compatibility with both commercial and military buffer setups, making it a reliable choice for firearm enthusiasts.Intended UseThis castle nut is primarily used in AR-15 builds, ensuring the buffer tube is securely fastened for optimal performance.Who It Is ForThis product is ideal for gunsmiths, hobbyists, and tactical shooters looking to build or maintain an AR-15 platform. If you are working with a 308 rifle, note that this castle nut is not compatible with those models.Key FeaturesMil-Spec Steel Construction: Provides exceptional durability and resistance to wear.Compatible with Most AR-15s: Fits a wide range of AR variants, ensuring versatility in your builds.Works with Commercial and Military Buffer Tubes: Adaptable for different setups, enhancing its usability.Color: Black: Offers a sleek appearance that matches other tactical components.Real-World UseWhen assembling your AR-15 at the range or in your workshop, the Advanced Technology A5101020 castle nut ensures that your buffer tube remains securely fastened, allowing for reliable cycling and performance during live-fire exercises.