As we just said, right now, everyone agrees that the Double Barrel is the strongest weapon in the game. So, we suggest you find here a first way to play it with the build that seems to emerge at the moment.
An army as strong as this could not remain a secret for long. Moreover, today big streamers like ChowH1 are interested in it. We suggest you find below the class he used as well as a gameplay video.
Call of Duty: Warzone Complete Guide