Whether chasing distant targets or trophy game, the TACTICAL PRSR-HD scope rings from Christensen Arms provide the most secure and advanced optic mounting platform available. The precision CNC-machined rings feature 6-bolt caps and a removable anti-cant bubble level to ensure shot-after-shot accuracy and unmatched performance. Features: 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.