Flechettes

Flechettes is a weapon mod for the harpoon gun in Fallout 76.

Crafting
Weapon modifications will modify an existing weapon, and any modifications previously equipped on the weapon will be destroyed, not unequipped. Loose mods cannot be crafted. For modifications unlocked through scrapping, the corresponding weapon must be scrapped in order to learn how to craft it.

Location

 * Craftable at any weapons workbench.
 * Loose mods may randomly be found in the Savage Divide, Mire and Cranberry Bog regions.
 * Loose mods may also be for sale from vendors.