The Guntec AR-15 Mil-Spec Carbine Receiver Extension Tube Gen 2 is precision-machined in the USA from high-quality T6 6061 aluminum and finished in a striking anodized gold. This six-position buffer tube features a Gen 2 notch cutout design, allowing the buffer detent to engage securely. Lightweight and durable, it’s compatible with .223/5.56, .308, and 9mm AR platforms.

Whether you're building a custom AR or adding a unique flair to your rifle, this receiver extension tube offers exceptional function with a show-stopping finish—all backed by Guntec USA’s commitment to quality since 1989.