Securely mounted optics are essential to the accuracy and precision of any rifle. To ensure the X-Bolt/X-Bolt 2 has the most stable mount possible, this system features an all new X-Lock scope mounting system that uses four screws per base, replacing the traditional two-screw system. The scope bases being secured at all four corners rather than only held at the center of the base enables more accurate placement of the bases on the receiver. This revolutionary new X-Lock system holds the base tighter to the rifle than ever before.