How to get the most out of the M16 in Call of Duty: Warzone. Updated on 21 December 2020 The M16 is one of the more accurate, deadlier rifles in Call of Duty: Warzone, now that it's made the jump to the battle royale game from Black Ops Cold War. As a marksman rifle, the M16 fires in bursts of three rounds with one trigger pull. Because of this, it's a typically accurate rifle from range, while also potentially killing a target immediately if you can lock into the enemy's head. The M16 isn't a particularly difficult weapon to unlock in either Black Ops Cold War or Warzone. If you've been using the weapon in the former game's multiplayer mode, you're almost guaranteed to unlock it as soon as you boot up Warzone thanks to its low unlock level in Treyarch's new game.