This model is designed to fit any riflescope with 1" maintube and is ideal for standard to magnum calibers. Our Cross-Slot mounts include the PRW2, QRW2, LRW, and Open Range series and deliver unmatched durability and strength. The PRW2 mounts are very popular since many rifles come with Weaver-style bases or cross-slot rails. QRW2s also work with cross-slot bases and offers the same features as our QR™ mounts, including +/- ¼ MOA accuracy when removing and replacing your optic. The LRW series mounts quickly and easily and offers a traditional look, while the Open Range series is made from lightweight 6061-T6 aluminum–both are compatible with cross-slot bases.