The F3H Demon was the first swept-wing jet fighter aircraft built by McDonnell Aircraft.  It was the first aircraft designed to be armed only with missiles rather than guns. The carrier-based, transonic, all-weather fighter entered service in 1956 and was used during the Lebanon and Quemoy crises of 1958.  It was the only single-engine Navy fighter McDonnell designed, and 522 Demons rolled off the assembly line until November 1959.
 

 
Fire Control and Weapons:
The F3H-2 was equipped with a combined search and single target tracking radar, used for search and target illumination for its two/four Raytheon Sparrow III missiles. The sparrow homes on radar energy reflected from the target. With its ability to read and correlate both the illuminating signal from behind and the target reflected energy ahead its clever signal processing allowed reliable tracking in the presence of countermeasures such as radio frequency noise jamming and metal foil chaff. Its principle advantages over the much cheaper Sidewinder is that it is immune to decoy flares, has a longer range, and carries a larger warhead. The Demons of VF-31 usually carried two sparrows and two Sidewinders and could be armed with 20mm cannon, and was seen armed with the latter while shore based in Florida during the Cuban Missile Crisis. Seeing those long chains of large cartridges in an open ammunition bay was much more chilling than the missiles that were so common - this looked serious!