Browning X-Bolt Integrated Scope Mount System - Smoked Bronze Cerakote 2 Pack 1in High. Securely mounted optics are essential to the accuracy and precision of any rifle. To ensure your new X-Bolt has the most stable mount possible this system features the 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 center enables more accurate placement of the bases on the receiver and holds the base tighter to the rifle than ever before. Compatible with Browning X-Bolt rifles only. Because of the 20 MOA elevation built in to these one-piece base and scope rings sets they are available in both short-action and long-action length sizes to fit your rifle. Specifications for Browning X-Bolt Integrated Scope Mount System: Manufacturer: Browning Gun Type: Rifle Features of Browning X-Bolt Integrated Scope Mount System Integrated Scope Mounts unitize the ring and base into a single unit machined from 7000 series aluminum to eliminate alignment problems and possible loose connections between bases and rings. Provides you with an additional 20 MOA of elevation so you can dial in more drop on your scope before you have to start "stacking" MOA/Mils. Available for both 30mm and 34mm scope tube diameters in a matte blued finish. Use the .400" Low ring height for scopes up to a 44mm objective with a standard barrel contour. Use the .500" Medium ring height for scopes up to a 50mm objective with a standard barrel contour. Use the .600" High ring height for scopes up to a 56mm objective with a standard barrel contour. Package Contents: Browning X-Bolt Integrated Scope Mount System Browning 12589: X-Bolt Integrated Scope Mount System - Smoked Bronze Cerakote 2 Pack 1in High