The legendary FAMAS or Bullfrog is a cult weapon at this point, and an obvious choice for many The Division 2 players. This assault rifle has the highest fire rate amongst all weapons in the game, which equals extremely high damage output.
However, FAMAS is not the best choice for long range shooting. In case your gameplan includes sniping enemies from afar, there are better weapons for that kind of purpose.
But if you do enjoy shooting opponents in the face at close range, there is no better option for that in the game right now.