Leupold’s Quick Release Rings and Bases allows you to quickly remove and replace optics from your firearm, all while maintaining a +/- ¼ MOA zeroing. The Quick Release Bases are available for specific firearm models made by manufacturers such as Remington, Thompson/Center, Traditions & Inline, Browning, Winchester, Mauser, Sauer, Steyr, Savage, Sako, Kimber, Tikka, and more. The Bases also come in one-piece and two-piece configurations. The Quick Release utilizes a patented lever mechanism to mount the Quick Release Ring to the Quick Release Base which engages the steel base to the ring by pulling it down and forward, locking it into place. This innovative system allows shooters to use multiple scopes on one firearm, and is an ideal option for individuals who remove the scope from their rifle during storage or transportation. Features of the Quick Release Rings and Bases: Available for a massive assortment of specific rifle modes made by many different manufacturers Available in one-piece and two piece configurations Allows scope to quickly be removed and replaces without losing zero Leupold QR Sauer 90/200 Matte Quick-Release 2pc Scope Base 50061