Event and upgrade supplies
weapon parts
Acquire a specific weapon part from the shop route and install it on the weapon you are building.
Shop > Circulation Hub > Weapon Parts Supplies; compare with the current event shop when open.
Repeat as needed while matching parts and currency are available; shop inventory is limited by its live stock and may change.
Stop when the target weapon has the part you planned to install or when current shop stock has no useful match.
Open a guide to find other locations and see what the item is used for.
Acquire a specific weapon part from the shop route and install it on the weapon you are building.