Brownells M4 Mil-Spec Buffer Tube Assembly, Black

Crafted with precision from high-quality 6061 aluminum, this buffer tube is engineered to meet the exact mil-spec diameter of 1.148 inches, ensuring seamless compatibility with any mil-spec carbine buttstock available. The hardcoat anodized finish not only enhances durability but also provides a resilient, long-lasting surface that withstands the harshest environments. Designed for convenience, all essential buffer tube assembly components are thoughtfully packaged together, making it an ideal choice for your next build. Whether you're upgrading or starting from scratch, this buffer tube offers reliability and performance you can count on.AR-15/M16/M4 receiver extension assembly with six positionsThe package comprises a mil-spec receiver extension/buffer tube, a receiver lock plate, a lock nut/castle nut, a carbine buffer and a carbine buffer springThe buffer tube is constructed with a mil-spec diameter and is made from 6061 aluminumThe weight of the carbine buffer is 3 ozThe buffer spring is constructed from 17-7 stainless steelHard-coat anodized coating