The Dead Air HUB Taper Xeno R-Series Adapter is a lightweight suppressor mounting option with non-negotiable repeatability and solid return to zero - ideal for precision minded shooters. The Xeno Mounting System still provides hardcore users with the durability you've come to expect from Dead Air. The DA455HT features an upgraded HUB Taper interface that increases surface contact between the suppressor and adapter, minimizing the risk of loosening during extended use. It also features an angular difference on the interfacing (HT) shoulder of the adapter to the silencer, providing a visual confirmation of proper torque. The shorter length and lockup positioning of the Xeno Mounting System make it shine