Leupold makes 2 different quick release systems. The QRW system uses a Weaver style rail, with QRW rings, that attatch and detatch themselves to the base/rail. The Leupold QR system uses a base that attaches, and detaches itself to Leupold QR rings. Two different systems, kind of the opposite from each other. I use both systems on different MZ's, and center fire rifles. I like both. I also have the Warne system on rifles, and like them also. Any one of these systems will serve you well.