Coming Soon: Dynamite
Dynamite is coming soon to Fortnite, according to the in-game MOTD.
It is expected to be available exclusively for the Wild West LTM, which was leaked when the last patch released.
As the weapon is already in the files, it may come before or after the next patch - we don't know yet. Just know it does not need a patch to be made available in-game.
We'll update you if anything else arises regarding the release date of this new explosive weapon.