Leupold steel Quick-Release (QR) rings and bases offer a seamless solution for removing and reattaching your optic while maintaining zero (+/- 1/4 MOA). This specific model is designed for the Winchester 70 Pre-64, making it a popular choice among muzzleloader enthusiasts and large caliber rifle users. The QR mounting system features a patented lever mechanism, precision-machined to ensure a secure engagement between the steel base and the ring. By pulling the lever down and forward, the system locks firmly into place, allowing for quick and easy transitions between multiple scopes on a single rifle. This functionality is especially beneficial for hunters and shooters who travel by air and prefer to detach their scope for transport. Our QR 1-piece and 2-piece bases are compatible with all QR rings, delivering the convenience and field-proven accuracy you expect from Leupold mounts. The connection between your scope and firearm is crucial, which is why our mounts are engineered to be as rugged and dependable as the optics they secure. With a vast selection of mounting systems available, you're sure to find the perfect match for your firearm and shooting style. Proudly made in the USA, Leupold mounts are built to withstand a lifetime of rigorous use, ensuring they will never let you down when it matters most. Upgrade your optics setup with Leupold QR rings and bases for unparalleled versatility and reliability.