Leupold Cross-Slot mounting systems feature Weaver-style rings that work with both Weaver or Picatinny rails with 1-piece and 2-piece bases available for many popular rifles. This model is designed to fit any riflescope with 1 maintube and is ideal for standard to magnum calibers. QRW2s also work with cross-slot bases and offers the same features as our QR mounts, including +/- MOA accuracy when removing and replacing your optic.