https://www.gamespot.com/articles/fortnite-521-patch-notes-update-adds-new-heavy-sni/1100-6461177/

Epic Games has released a new Fortnite update for PS4, Xbox One, PC, Switch, and mobile, bringing a new weapon and a pair of limited-time modes to Battle Royale, and freshening up the challenges for Save The World modes. Patch 5.21 arrived on August 15, and the LTMs should be available for at least a week.

The biggest addition to Battle Royale is that of the Heavy Sniper Rifle, the name of which is fairly self-explanatory. It deals serious damage, particularly to structures, but that comes at the expense of a long reload time. It's available in Epic and Legendary versions, and the bullets it fires drop less than those of other snipers.