Can only be bought from the vendors below.
|Ae-Ri (Raiders reputation of Ally)||The Crater|
|Scavenger trader (character level of at least 15)||Camp random encounter|
|Sunny (Settlers reputation of Ally)||Foundation|
The plan unlocks crafting of the ultracite arrows mod for the compound bow at a weapons workbench. It also unlocks crafting of the following ammo types at a tinker's workbench if they have not already been learned: