Leupold steel standard (STD) rings and bases are renowned for their versatility and stand as the most flexible mounting system in our line up. Specifically designed to fit a browning X-bolt, this model is the ideal choice for standard calibers under 0.300 Win. Mag. STD rings are available in five distinct heights and are meticulously engineered to seamlessly pair with STD 1-piece or 2-piece bases. The front dovetail ring offers pivot capability, allowing for lateral adjustments via the rear windage screws during bore sighting. Additionally, shims can be employed to reserve the scope's elevation adjustment for BDC (bullet drop compensation) dial applications. There's nothing more critical than the connection between your scope and firearm. This is why our mounts are engineered to be as rugged and dependable as the Leupold optics they secure. With an extensive array of mounting systems to choose from, you're guaranteed to discover the perfect match for your firearm and shooting style. Crafted in the USA and backed by a lifetime of durability, Leupold mounts are unwavering in their performance and will never let you down.