Geissele premium mil-spec buffer tube with Super 42 spring elevate your AR-15's performance with the Geissele premium mil-spec buffer tube, a pinnacle of precision engineering and durability. Crafted from high-grade 7075-T6 aluminum, this buffer tube is not only robust but also lightweight, weighing in at just 3.7 oz. Its type 3 hardcoat Anodized finish, available in classic black or Geissele's distinctive DDC, ensures long-lasting protection against wear and corrosion, making it a reliable choice for any shooting environment. Designed to meet and exceed mil-spec standards, this buffer tube features six adjustable stock positions, providing you with the flexibility to customize your rifle's fit and feel. Its carbine length and mil-spec diameter guarantee seamless compatibility with most AR-15 stocks, ensuring a perfect fit for your lower receiver. Included in this premium package is a high-quality mil-spec castle nut and end plate, ensuring a secure and stable assembly. But the true innovation lies in the Geissele Super 42 spring. Inspired by the legendary German MG42 Machine Gun, this spring features a unique design with three independent wire strands. This configuration acts as a harmonic damper and energy absorber, significantly reducing the risk of spring failure and enhancing the overall reliability of your rifle. The Super 42 spring offers a 15% stronger average return force compared to standard buffer springs, providing superior performance in challenging conditions, such as when operating with a dirty weapon or using steel-case ammunition. Additionally, it eliminates the distracting spring reverberations (twang) typically experienced through the buttstock offering a smoother and quieter shooting experience. Choose the Geissele premium mil-spec buffer tube with Super 42 spring for unparalleled reliability, enhanced performance and a superior shooting experience. Proudly made in the USA, this buffer tube is the ultimate upgrade for your AR-15, ensuring consistent performance and longevity. Constructed from high-quality 7075-T6 aluminum Completed with type III hardcoat anodize finish Number of stock positions is 6 The innovative spring design incorporates three separate wire strands The super 42 spring exhibits an average return force that is 15% stronger than that of the standard buffer spring