Some materials in The First Descendant are only available from select sources. One of these materials is the Compound Carbon Activator, which is required to craft items like Greg's Reversed Fate tactical rifle.
FASTEST WAY TO FARM COMPOUND CARBON ACTIVATORS | THE FIRST OFFSPRING
Here's how to get the Compound Carbon Activator in The First Descendant and the best farming method.
The Compound Carbon Activator drops from Elite enemies in two Infiltration Operations in White-night Gulch: Bio-Lab and Mystery's End. You can play them on any difficulty, but Hard drops more materials.
Your best option to farm this material is to do a private Mystery's End mission on Hard difficulty. Play until you reach a room with a metal hand and an Elite Warden. Kill the Warden to get the Compound Carbon Activators, leave, restart the mission and do it again.
