To complete the final stage of the quest «You should choose to accept it, Part IV» In Destiny 2, you must visit the tower gunsmith, Banshee-44, who is the weapon expert in the game.
Known for his extensive knowledge of all forms of weaponry, Banshee-44 is the person to visit once you've Collected all four Exotic Catalysts for the Zero Review Exotic Pulse Rifle. He is the right location to visit to complete the Exotic Catalyst Zero Review quest.
Where to find Banshee-44 in Destiny 2
To find the Weapons Expert for the "You Should Choose to Accept It, Part IV" quest in Destiny 2, you need to head to the Tower. Once there, from the main landing area of the Courtyard, head forward and to the right, towards the tunnel and walkway leading to the Tower Bazaar.
Along the way, you will see the blue exo bot in his gunsmith shop, embedded in the tunnel wall, that's Banshee-44, the gunsmith you need to complete the mission. Talk to him to get the end dialog and conclude the Exotic Catalyst Zero Review quest.
On the other hand, you should make sure to visit the Enclave of Mars on the Throne World of Savathun. There you will be able to remodel Zero Review into the Weapon Crafting Relic.
To complete the mission «You should choose to accept it, Part IV» In Destiny 2, you need to talk to the Banshee-44 Gunsmith in the Tower. You can find it in the Tower Bazaar, located to the right of the main landing zone of the Courtyard.
Once you talk to him, you'll get a dialog that concludes the Exotic Catalyst Zero Review quest. Don't forget to visit the EMars nclave on the Throne World of Savathun to remodel Zero Review in the Weapon Crafting Relic and customize your exotic weapon.