Leupold cross-slot mounting systems are equipped with weaver-style rings compatible with both weaver and picatinny rails, available in one-piece and two-piece bases for a wide range of popular rifles. This specific model is tailored for the Nosler M21 and is suitable for standard to magnum calibers. Our cross-slot mounts, including the PRW2, QRW2, LRW and Open Range series, offer exceptional durability and strength. The PRW2 mounts are highly favored due to the prevalence of weaver-style bases or cross-slot rails on many rifles. The QRW2 series is also compatible with cross-slot bases and shares the same features as our QR mounts, such as maintaining +/- MOA accuracy when detaching and reattaching your optic. The LRW series provides a quick and easy installation with a traditional appearance, while the Open Range series, constructed from lightweight 6061-T6 aluminum, is also compatible with cross-slot bases. The connection between your scope and firearm is of utmost importance, which is why our mounts are as robust and reliable as the Leupold optics they support. With a vast selection of mounting systems available, you are certain to find the ideal match for your firearm and shooting style. Manufactured in the USA and guaranteed to withstand a lifetime of rigorous use, Leupold mounts are designed to never disappoint.