CHRIS RINGS TACTICAL 30MM MEDIUM Made in collaboration with Warne Precision CNC machined from 7075/T6 aluminum for a high strength precision platform. Hardcoat anodized finish for abrasion and corrosion resistance. Rings feature stainless steel hardware for "Element Proof" protection. Standard 1/2" nut attachments to ensure secure and consistent clamping force. Fits Picatinny style mounts and are NATO-STANAG compatible. Available for 30mm and 34mm tube sizes; in Medium and High; for maximum compatibility with most scope/firearm combinations. Includes removable anti-cant bubble level system to ensure your rifle is perfectly level for shot-after-shot accuracy.