Well sup guys, i haven't made this hack. I have found it.
so here we go
This is a simple trainer that will set four of your challenges to next to complete.
Numpad 1 - Sets Anti-Air Specialist Challenge to 74 (+5,000 XP)
Numpad 2 - Sets Career Headshot Challenge to 999 (+5,000 XP)
Numpad 3 - Sets Career Kills Challenge to 9999 (+10,000 XP)
Numpad 4 - Sets Career Wins Challenge to 499 (+5,000 XP)
Use this trainer while in the barracks only. Do not use it while in the lobby. Once you are in the barracks, start the trainer, press the numpad keys that you want (1-4), then exit the trainer.
If you selected all of the options, then if you simply get 1 kill in the match, 1 headshot, take out 1 aircraft and win the match, you will get at least 25,000 XP. Even getting only a single kill will award you with 10,000 XP.
Then, if you want to use it again, simply exit the game lobby, enter the barracks, start up the trainer, select your options, then exit the trainer and play another match. Enjoy!