Upgrade your AR15 with the BCM Pistol Receiver Extension Kit, designed for AR15, M16, and M4 pistol lower receivers. This comprehensive kit includes a high-quality buffer tube machined from durable 7075T6 aluminum and features a hard coat anodized finish per Mil-A-8625F, Type III, Class 2. With a 1.2″ outside diameter, it is compatible with ATF compliant SigTac SB15 type pistol stabilizing braces. The kit also includes a receiver end plate, lock nut (castle), action spring (carbine), and buffer. Enhance your shooting experience with this reliable and robust pistol buffer tube assembly.









