The Primary Weapons Systems ratchet lock castle nut and end plate set is designed for hassle free installation and a secure fit without the need for staking. Made from durable 4140 steel, this set is compatible with both commercial and Mil-Spec buffer tubes, ensuring versatility in your build. It works seamlessly with the Enhanced Buffer Tube Mod 2 and allows for easy removal when needed. Offering a solid, reliable connection, this castle nut and end plate set is perfect for those looking for simplicity and durability in their AR-15 lower build. The ratchet-lock design eliminates the need for staking the castle nut Works with both Mil-Spec and commercial buffer tubes Integrated QD mount for quick and secure sling attachment, offering versatility and ease of use Constructed from durable 4140 steel for enhanced strength and longevity Provides a rock solid lockup for maximum stability and reliability Offers easy installation and simple removal when necessary Includes a lifetime guarantee