https://www.gamespot.com/articles/fortnite-update-42-out-now-here-are-the-patch-note/1100-6458986/

Following a slight delay, Epic has deployed the latest patch for Fortnite. Update 4.2 is now available across PS4, Xbox One, PC, and mobile, and it brings a handful of new items and some gameplay adjustments to both Battle Royale and Save the World.

On the Battle Royale side, Epic Games has introduced Epic and Legendary variants of the Burst Assault Rifle, which can be found as floor loot or in treasure chests, supply drops, or vending machines. Like other Burst Assault Rifles, the Epic and Legendary variants use medium ammo and have the same damage fall-off ranges.