The Burris Optics XTR Signature Rings 420211 are purpose-built for tactical shooters seeking precision and adaptability. These rings offer exceptional holding power without adding unnecessary weight to your setup. Engineered for long-range performance, the XTR Signature Rings come with adjustable MOA inserts that allow for precise elevation adjustments. Whether you're shooting at 0, 5, 10, 15, 20, 25, 30, or 40 MOA, these rings ensure your scope is perfectly aligned. Corrects misalignment caused by off-center receiver holes No need for expensive tapered bases or shimming for thousand-yard shooting Elevate your shooting experience with the unparalleled versatility of Burris Optics XTR Signature Rings.