There are many weapons in Apex Legends that strike fear into the hearts of players. Usually, Vantage’s ultimate, Sniper’s Mark, isn’t one of them. Yes, the weapon can dish out serious damage if it hits a follow-up shot on a target it’s already marked, but it has a fairly slow, bolt-action reload animation and players generally have enough time to get behind cover once they’ve been hit by the first bullet from the Sniper’s Mark before an enemy Vantage can get the double damage bonus on the second shot.
That is, unless there was a way to fire the Sniper’s Mark at almost the same fire rate as the Wingman. And, because this is Apex, of course there’s a way for that to happen.