F-35 lemon files - it can't fire it's gun

Not until 2019, despite it being due to be used in battle.

The Pentagon’s newest stealth jet, the nearly $400 billion Joint Strike Fighter, won’t be able to fire its gun during operational missions until 2019, three to four years after it becomes operational. 

Even though the Joint Strike Fighter, or F-35, is supposed to join frontline U.S. Marine Corps fighter squadrons next year and Air Force units in 2016, the jet’s software does not yet have the ability to shoot its 25mm cannon. But even when the jet will be able to shoot its gun, the F-35 barely carries enough ammunition to make the weapon useful. 

The JSF won’t be completely unarmed. It will still carry a pair of Raytheon AIM-120 AMRAAM long-range air-to-air missiles and a pair of bombs. Initially, it will be able to carry 1,000-pound satellite-guided bombs or 500-pound laser-guided weapons. But those weapons are of limited utility, especially during close-in fights. more