The Guntec USA CASTLE-EXD-C Extreme Duty Wide Castle Nut is a must-have for firearm enthusiasts seeking maximum reliability and performance. Made from high-quality steel, this durable castle nut withstands extreme conditions, ensuring optimal functionality and longevity. Its innovative Gen 3 design promotes seamless compatibility with both Mil-spec and commercial buffer tubes, enhancing stability during your shooting sessions. Constructed from premium high-quality steel Gen 3 design for improved aesthetics and functionality Compatible with Mil-spec and commercial buffer tubes Extreme strength for superior durability Sleek chrome finish for enhanced appearance Elevate your shooting experience with the Guntec USA CASTLE-EXD-C today.