Leupold steel Standard (STD) rings and bases are the most versatile mounting systems available, expertly designed for reliable support of your optics. This specific model is tailored to fit the Browning BLR and is an ideal choice for standard calibers under .300 Win. Mag. The STD rings are comes in five different heights, ensuring a precise and customizable fit when paired with either STD 1-piece or 2-piece bases. One of the standout features of these rings is the front dovetail ring, which pivots to allow for lateral adjustments using the rear windage screws during bore sighting. Additionally, shims can be utilized to preserve the scope's elevation adjustment for BDC (bullet drop compensation) dial applications, enhancing your overall accuracy. The connection between your scope and firearm is crucial, which is why Leupold mounts are crafted to be as rugged and dependable as the optics they support. With a wide variety of mounting systems to choose from, you're sure to find the perfect match for your firearm and shooting style. Proudly made in the USA and built to withstand a lifetime of use, Leupold mounts are guaranteed to deliver consistent performance and reliability you can count on.