This season 7 week 6 epic quest requires you to collect gold bars.

Gold bars are a currency used in the game to purchase items and weapons from NPCs and vending machines.

The best way to collect gold bar is from completing quests from NPCs and payphones, and completing bounties. You can also get gold bars from eliminating other players, opening chests, opening safes and destroying beds. These methods do not give you a lot of gold bars so getting to 500 quickly would require completing quests.

A good method for getting and completing quests from NPCs is as follows. Firstly go into a battle lab game and get yourself a UFO. Fly the UFO round to different NPCs and payphones. Accept any quest that lasts for 60 minutes. When you have some quests leave and jump into a team rumble game. When in the game focus on completing every quest you can. You should have 500 gold bars in no more than 2 games.