A rear gun sight device for a rifle having a receiver and cover, the receiver having a tee shaped slot on the top rear of the receiver. This slot is designed to accept and retain a recoil assembly. The invention replaces the rear portion of the recoil assembly allowing the invention to perform the function of the original rear portion of the recoil assembly as well as provide a rear sight for the rifle. This invention is comprised of a sight base provided with a tee shaped base to engage the tee shaped slot in the top rear trunion of the rifle's receiver, a spring boss to accept the end of the recoil spring when assembled in the recoil assembly, a spring guide to guide the recoil spring, a sight component assembly comprised of windage and elevation adjustment components as well as aperture sight components, and cover retention elements.