Description

Enhance your AR with the B5 Systems Sierra K Receiver Extension Kit, expertly crafted for precision and reliability. This complete assembly includes a reduced-length, mil-spec diameter 7075 aluminum 5-position receiver extension. It features a short heavy buffer weighing 3.5 oz, an extra power spring, a castle nut, and a quick disconnect end plate, ensuring optimal performance and durability. Perfect for AR enthusiasts seeking a high-quality buffer tube assembly, this kit offers a sleek black finish and compatibility with the Sierra K Buttstock.