It's recommended to rent a server you which will cost £1.19 (or your local currency equivalent)
Map: Alborz Mountains,
Game Mode: Conquest
Capture flag "C" then wait a minute commit suicide and choose to go into the Gunship get a team mate to go to "C" and keep firing until they die.
Once done the trophy will unlock.
Please note you need a minimum of four gamers to start a match