Browning X-Bolt Integrated Scope Mount System 30mm Low Smoked Bronze Cerakote. To ensure the new X-Bolt 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. Specifications for Browning X-Bolt Integrated Scope Mount System 30mm Low: Manufacturer: Browning Tube Diameter: 30 mm Fabric/Material: Aluminum Color: Smoked Bronze Cerakote Features of Browning X-Bolt Integrated Scope Mount System 30mm Low Integrated Scope Mounts unitize the ring and base into a single unit machined from 7000 series aluminum and eliminate alignment problems and possible loose connections between bases and rings. 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. Available for both 1" and 30mm diameter scopes in Smoked Bronze Cerakote Burnt Bronze Cerakote gloss and matte blued finishes. Package Contents: Browning X-Bolt Integrated Scope Mount System 30mm Low Browning 12543: X-Bolt Integrated Scope Mount System 30mm Low Smoked Bronze Cerakote