The KAK Shockwave Tube is an AR-15 Pistol Buffer Tube / Receiver Extension which is designed to work with the Shockwave Blade Pistol Stabilizer Brace but will also work for other pistol builds. It features an anti-rotation and anti-thrust design so that it’stays in place when being operated. The 12 adjustment dimples allow you to get a very rigid fit. This unit will attach with a standard mil-spec castle nut (not included) and will work fine with QD end plates.