Fortnite 4.5 update
Counter-Strike players may be a bit excited by the latest update for Fortnite. The 4.5 update adds in Dualies! I mean they're not specifically the Dual Berettas, but you get the idea. To put it simply, you can now dual wield pistols in Fortnite Battle Royale. Hey, don't worry too much there Save the World fans, there's something in this update for you too.
Celebrate summer with a bang! Explosions from the Grenade Launcher now emit firework effects for a limited time. Double the firepower and fun, the Dual Pistols can now be found in Battle Royale. Test your aim and let your imagination run wild in the new Playground LTM. The quadrilogy questline comes to an end... Witness the conclusion of Blockbuster in its final chapter, now available in Save the World!

Dual Pistols (Battle Royale)
Experience two times the fun and firepower with Dual Pistols, the newest weapon introduced to Battle Royale.

Playground LTM (Battle Royale)
Train, explore, battle! Show us your creativity in the new Playground LTM as you drop onto the island with up to 3 friends.

Map Markers (Battle Royale)
Go towards the light! Visual indicators are now shown in-game wherever friendly map markers are placed.

Blockbuster Event Part 4 (Save the World)
Discover how the quadrilogy ends in the finale of the Blockbuster event.

Builder Pro (Save the World)
Build at lightning speeds, the long-awaited Builder Pro controller layout comes to Save the World.

- Adjusted to limit player's ability to peek through structures while editing.

Hold on, these aren't all of the changes. Epic provided a comprehensive list of changes in the full 4.5 Fortnite changelog. Be sure to check that out for all of the nitty gritty details.