Abstract: A rear sight device for an SKS or similar type rifle includes a sight base assembly and a sight component assembly. The sight component assembly is adjustable mounted on the sight base assembly and includes sight elements of well-known construction. The sight base assembly includes a vertical plate having locating arms which engage the side walls of the rifle receiver. A pivot bolt extending through openings in the locating arms, rifle receiver and cover mounts the sight device on the rifle. Adjustment screws on the vertical plate or locating arms urge planar pads on the vertical plate against the rear wall of the receiver plate against the rear wall of the receiver to firmly mount the rear sight device on the receiver.