Cod Blops 3 zombies If you max level all weapons do you get something?

In Call of Duty: Black Ops 3 Zombies, maxing out all weapons does not directly grant any special rewards or unlocks. However, leveling up weapons contributes to your overall progress and can help unlock attachments and camos for those weapons. Additionally, achieving high levels in Zombies can lead to Prestige and other in-game accomplishments that enhance your gameplay experience.