Fallout 76 weapon mods

Overview
Weapon mods can be built from raw materials and attached to weapons at weapons workbenches. This includes sights, barrels, stocks, receivers, magazines and more. The Gunsmith perk is required to create better modifications for guns. The Science perk is used to create better modifications for energy weapons and create advanced modifications for bullet-based firearms. The Makeshift Warrior perk is used to create better modifications for melee weapons. Weapon mod plans can often be learned by scrapping the weapon at any workbench.

Legend:

A weapon mod either cut from the final game or being unused, therefore being unobtainable in-game.

Irregular mods
The following mods are not learnable from a plan or via weapon scrapping and therfore can't be crafted at a workbench. There are no loose mods for them found in the game, they can only be found already attached to weapon.