https://www.gamespot.com/articles/new-fortnite-battle-royale-mode-solid-gold-v2-now-/1100-6459120/

Fortnite's 4.2 content update is now available, and along with finally introducing jetpacks to the game, it marks the beginning of a new limited-time mode in Battle Royale. The second iteration of the Solid Gold event is now underway on PS4, Xbox One, PC, and iOS, and as before, the theme of the mode is Legendary weapons.

Every weapon that players find while playing Solid Gold v2 will be of the Legendary variety. Developer Epic has also adjusted the drop rates for each weapon. Now, players will have a high chance of finding the Hand Cannon and Suppressed Pistols as floor loot; the Assault Rifle, Minigun, and Sniper Rifle will appear most commonly in chests; and the Rocket and Grenade Launcher have the highest chance of appearing in supply drops.