It's recommended to rent a server you which will cost £1.19 (or your local currency equivalent)
Map: Alborz Mountains,
Game Mode: Conquest
Enemy to Capture flag "C" then wait a minute for it to spawn. Commit suicide and spawn at your teams base RU or US. Get into a F-35 and fly towards the Gunship and use the machine gun to shoot it down.
Once done the trophy will unlock.
Please note you need a minimum of four gamers to start a match