Leupold steel Quick-Release (QR) rings and bases offer a straightforward solution for removing and reattaching your optic while maintaining zero (+/- 1/4 MOA). This specific model is designed for the Browning BAR and is a favored choice for muzzleloader enthusiasts and large caliber rifle users. The QR mounting system features a patented lever mechanism, machined with precision tolerances 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 you to easily switch between multiple scopes on a single rifle. This feature is particularly 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 crucial, which is why our mounts are designed to be as rugged and dependable as the optics they secure. With a wide variety 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 counts. Upgrade your optics setup with Leupold QR rings and bases for unmatched versatility and reliability.