Leupold's versatile steel Standard (STD) rings and bases are ideal for mounting on a Browning X-Bolt, suiting standard calibers below .300 Win. Mag. Available in five heights, these rings align perfectly with STD 1-piece or 2-piece bases. The front dovetail ring swivels, enabling lateral adjustment via rear windage screws during bore sighting. Shims can also be employed, preserving the scope's elevation adjustment for BDC dial applications. The robust and reliable Leupold mounts, matching the quality of their optics, ensure a secure connection between your scope and firearm. With numerous mounting systems to choose from, you'll find the ideal fit for your firearm and shooting style. Crafted in the USA, these mounts are built to last a lifetime.