The Burris Optics 420210 XTR Signature Rings are engineered for tactical shooters demanding reliability and versatility. Their lightweight design provides robust holding power, ensuring enhanced performance under extreme conditions. Each ring set includes an array of MOA inserts, allowing for precise adjustments in scope alignment. These rings enable configurations for up to 40 MOA of cant, facilitating improved accuracy without the need for tapered bases. Corrects misalignment caused by off-center receiver holes No need for expensive tapered bases or shimming for thousand-yard shooting Achieve superior shooting precision with the Burris Optics XTR Signature Rings.