

Weapon base AP cost + (weapon AP multiplier x mod AP effect)Įach weapon has a different base value of action points that it uses per shot. There are three numbers that determine what the AP cost is for every type of modded weapon: the weapon's base AP cost, the weapon's AP multiplier, and the mod's AP effect, and they do it based on this formula: This section is based on research presented in YouTuber RedMage's video: "Fallout 4: VATS and AP Formula Solved!" 10mm pistol The formulaĪttacking from V.A.T.S. This allows for almost any ranged firearm to be customized to fit the player's character build. Grip mods create pistol weapons, while stock mods create rifle weapons.


The Science! perk is used to create better modifications for energy weapons and create advanced modifications for bullet based firearms. The Gun Nut perk is required to create better modifications for guns. There are over 700 mods, generally including sights, barrels, stocks, receivers, magazines and more. Weapon mods can be built from raw materials and attached to weapons at weapons workbenches.
