SMC111SIII is an upgraded model based on the S-type due to the SD-type off-axis problem that seriously affects maneuverability. He added an afterburner, but removed the flame bomb launch system. Because the S-type maneuverability is enough to dodge missiles. SIII has further trimmed the aerodynamics and shape. It was replaced with a new wing fence and the cockpit moved forward. In order to maintain stability, the design of a fully movable horizontal tail was cancelled. This model is also replaced with ATAC mk7-n cannon, which improves the rate of fire and accuracy, but the ammunition is reduced. 1: Landing assistance stabilization system 2: Air brake 3: Parachute 4: Afterburner 7: Signal light