The Leupold steel Standard (STD) rings and bases are our most adaptable mounting system on offer. This particular model is highly compatible with a Winchester 70A, making it an optimal choice for standard calibers under .300 Win. Mag. Available in five distinct heights, the STD rings are deftly engineered to align perfectly with either STD 1-piece or 2-piece bases. The front dovetail ring of this model pivots, offering lateral adjustments via the rear windage screws during bore sighting. You can use shims for further customization, which leaves the scope\'s elevation adjustment free for BDC (bullet drop compensation) dial use. We understand that the most vital element is the connection between your scope and firearm. Hence, our mounts are designed to be as robust and reliable as the renowned Leupold optics they secure. With an extensive choice of mounting systems available, we are confident that you will find the ideal match for your firearm and shooting style. Leupold mounts are proudly made in the USA and guaranteed to sustain a lifetime of rigorous use without failing you. Trust in Leupold mounts to always stand firm.