Leupold steel Quick-Release (QR) rings and bases simplify the process of removing and reattaching your optic while maintaining zero (+/- 1/4 MOA). This specific model is designed for the Mauser FN and is a popular choice for muzzle loaders and large caliber rifles. 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 transitions between multiple scopes on a single rifle. This 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, providing the convenience and field-proven accuracy you expect from Leupold mounts. The connection between your scope and firearm is critical, which is why our mounts are built to be as rugged and dependable as the optics they secure. With a wide 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 guaranteed 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 exceptional versatility and reliability.