The barrel-mounted dovetail bullseye sight enables swift target acquisition with precise alignment, thereby improving shooting accuracy. Its steel, double-ring peep design ensures consistent sight alignment and assists in refining shooting techniques. Any misalignment of the rear sight results in the front sight deviating from the center ring, prompting the shooter to realign. This sight serves as a replacement for standard 3/8 inches dovetail rear sights on various rifles and is compatible with both bead-type and traditional blade front sights.