No removable base system locks your scope bases down more securely than the X-Lock system. Securely mounted optics are essential to the accuracy and precision of any rifle. To ensure the X-Bolt has the most stable mount possible, it features an X-Lock scope mounting system that uses four screws per base, replacing the traditional two-screw system. Securing the scope bases at all four corners, rather than only held at the centre of the base, allows for more accurate placement of the bases on the rifle’s receiver. This revolutionary X-Lock system holds the base tighter to the rifle than ever before.