LW50 - The Marines are doing things differently. They are going for an early IOC using an interim software standard (Block 2B) that only runs on pre-2016 jets, so as it stands they have about enough to equip one squadron, which is forming up with hand-picked pilots. 2B also has Mach, speed, altitude and g restrictions and has internal weapons only - JDAM, LGB and AMRAAM.