The sight bases and blades are precision-engineered from a high-tensile strength, corrosion-resistant alloy. They feature dovetailed windage and elevation adjustments with hardened gib locks. Adjustments can be made swiftly by loosening a single screw. No barrel dovetailing is required. The medium-sized component features a 0.395 inches radius and is compatible with barrels ranging from 0.730 inches - 0.830 inches in diameter