Here is a list of all the Leviathan Raid Weapons & Armor both Legendary and exotic.

Leviathan raid Legendary weapon “INAUGURAL ADDRESS”

Legendary Sins of the Past Rocket Launcher

Legendary Robes of the Fulminator – chest armor

Legendary Mob Justice – Submachine gun

Legendary Ghost Primus – Auto Rifle
Destiny 2 Leviathan Raid Armor & weapons (Exotic & Legendary)