The U-notch rear sight sets employ a precise 3-dot configuration, featuring two green fiber optic dots at the rear to provide sharp contrast and facilitate rapid sight acquisition under various lighting conditions. For most rifle models, no drilling or tapping is necessary. The dovetailed front and rear sights may require minor adjustments for proper fitting. The rear slide/blade combination is compatible with all standard-sized Williams adjustable rear guide open sight bases, transforming traditional rear iron sights into fire sights. The aluminum blade incorporates a single U-shaped green fiber optic rod to ensure 2-dot accuracy. These sights can be used with the existing factory front sight or paired with the fiber optic Williams rifle sight bead available separately. The product features a black anodized finish on aluminum, providing a sleek, durable, and corrosion-resistant surface that enhances both aesthetics and longevity