Elevate your AR-15 build with the Guntec USA AR-15 M4 Mil-Spec Six Position Buffer Tube Kit, designed for both durability and versatility. This kit ensures smooth operation and enhances overall performance, making it a must-have for serious enthusiasts. Six adjustable positions for customizable length Durable, lightweight aluminum construction Compatible with Mil-Spec stocks Easy installation for hassle-free setup Transform your shooting experience with the reliability of Guntec USA!