Leupold steel Standard (STD) rings and bases are the most versatile mounting systems available, offering a reliable and precise connection between your scope and firearm. For your custom build, pair the Gunmakers front dovetail base with the Gunmakers windage base to create a solid foundation, ideal for standard calibers under .300 Win. Mag. Comes in five different heights, the STD rings are precision engineered to align perfectly with STD 1-piece or 2-piece bases. The front dovetail ring pivots, allowing for lateral adjustment using rear windage screws during bore sighting, ensuring optimal accuracy. Shims can also be applied to save your scope's elevation adjustments for BDC (bullet drop compensation) dial applications, giving you greater flexibility. Leupold's mounts are designed to be as tough and dependable as the optics they secure, making them an essential part of any precision shooting setup. With a wide variety of mounting systems to choose from, you'll easily find the perfect match for your firearm and shooting style. Made in the USA and built to last a Lifetime, Leupold mounts provide rugged performance you can trust in any environment.