Compared to the original type, and MiG - 23C (intercept), wheels and tail no major changes, but the fuselage was redesigned, the inside of the cockpit fitted with 10 mm thick armor. Wind speed increase installed bulletproof glass and vertical tail changed to can be installed in the oil, but the machine without refueling device, gear switch to low voltage large size tire, in rough field airport landing.
In MIG - 23C based on the improvement of the prototype, the new head. Can be used for daylight attack enemy ground fixed target. A AL-21F-300 turbojet engine, afterburner thrust of 109.8 kn (11200 kg). Take-off weight is increased, landing gear to strengthen, use low-pressure tires. "Background" laser range finder, "Eagle" - 23C sight, KH-23 navigation system. Weapons for a Gsh-23 cannon and 4000 kg of bombs, rockets, x-23 laser guided bombs and empty K-13 missiles and other.