Securely mounted optics are essential for accuracy and precision on any rifle. To ensure the new X-Bolt has the most stable scope mounting system possible, the X-Lock mounts feature an all new four screw per base design that replaces the traditional two screw system.
The benefits are obvious, with the bases being secured at all four corners, rather than only attached at the center of the base for more accurate placement on the receiver.
Details on the X-Lock Scope Mount Design from Browning Engineers.
The Tech-Term "X-Lock" is referred to in the following products: