The Xeno Xero threaded taper mount is a muzzle device that gives you a lightweight minimalist mounting option offering non-negotiable repeatability and a solid return to zero. All this while still delivering the durability you’ve come to expect from a Dead Air mount. The shorter size decreases its entrance into the blast chamber, maximizing sound performance and minimizing overall weight. The Xeno Xero is compatible with all Dead Air Xeno Adapters. The 1/2x28 Xeno Xero has a bore size to fit 9mm and smaller projectiles.