So in case you don't know, a dev chest is a chest in Fortnite: Reload that drops all 5 heisted exotics: Heisted Blink Mag SMG, Heisted Explosive Assault Rifle, Heisted Breacher Shotgun, Heisted Accelerant Shotgun, an Heisted Run 'n' Gun SMG. These are very, very, very rare, and I found one, so this is the screenshot
Fortnite battle passssssss it kinda looks like there is 4 exotics, i promise there's 5
