(Disable Autosave!)

This is both good and bad. Good because you can easily acquire all the Marksman medals. Bad because you will destroy ALL targets using machine gun only.

I suggest finishing this mode using F/A-18F with ECMP. At the start of each mission or after taking off, switching your SP weapon to ECMP will prevent any accidental missile firing and at the same time will allow you to use your ECMP faster.

You can use other more powerful planes but remember, it will just take one missile or SP weapon misfire and your machine gunning streak is over. You will need to restart the mission or the last checkpoint in case that happens. Make sure that during debriefing, your machine gun kills should register 100%. Anything else than that, you will need to retry the mission.