Fallout 4 weapon mods

For a list of legendary weapon effects in Fallout 4, see Legendary weapon effects.

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This page lists all weapon mods in Fallout 4.

• The content is not described in full detail on this page. For details, please see the respective articles.
• For weapon mods in other Fallout games, please see "Weapon mod".
• For an overview of Fallout 4 content, please refer to "Portal:Fallout 4."

 

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Overview

Weapon mods can be built from raw materials and attached to weapons at weapons workbenches. There are over 700 mods, generally including sights, barrels, stocks, receivers, magazines, and more. The Gun Nut 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 Blacksmith perk is used to create better modifications for melee weapons.

Perks and weapon mods

Most firearms, including energy weapons, offer the option to customize the grip/stock, receiver and sight, changing which perks affect the weapon.

• A firearm with an automatic receiver gets bonuses from the Commando perk.
• A firearm with a non-automatic receiver and pistol grip get bonuses from the Gunslinger perk.
• A firearm with a non-automatic receiver and a stock mod get bonuses from the Rifleman perk.
• The Sniper perk only works with a non-automatic firearm with a scope, which use the "hold breath" mechanic.

Grip mods create pistol weapons, while stock mods create rifle weapons. This allows for almost any ranged firearm to be customized to fit the player's character build.

Ballistic weapons

Slot	Mod	10mm pistol	Assault rifle	Combat rifle	Pipe
					Pistol/Rifle	Revolver	bolt-action
Receiver	Standard receiver	001A8A43	001A8A4C	000A7679	001A8A96	001A8A9A	001A8A90
	Light frame receiver	0015BD70	0018895B	0014837E	0015C856	0015C89A	0015C87B
	Heavy frame receiver	0015BD6F	0018895A	0014837D	0015C855	X	X
	Calibrated receiver	0015BD6D	00188958	0014837B	0015C853	X	X
	Hardened receiver	0015E92A	0018895C	0014837F	0015C857	X	X
	Automatic receiver	0015E928	00188952	00148373	0015C84B
	Armor piercing automatic receiver	0015BD6A	00188953	00148374	0015C84C
	Hair trigger receiver	00015B6E	00188959	0014837C	0015C854
	Powerful receiver	0015E92B	0018895D	00148380	0015C858	X	X
	Hardened automatic receiver	0015FA2C	00188954	0014837A	0015FA2D
	Rapid automatic receiver	0015BD69	00188955	00148377	0015C84F
	Calibrated powerful receiver	00161D09	0018895E	00161CFE	00161D0D	X	X
	Hardened piercing auto receiver	00161D19	00188956	0015FA20	00161D1C
	Advanced receiver	0015BD67	00188951
	Powerful automatic receiver	0015FA31	00188957	0014837A	0015C852
	.45 receiver		N/A	Standard	0015C849
	.38 receiver		N/A	00210486		X	X
	.308 receiver		N/A	00148371		X
	.50 receiver		N/A	N/A			X
Barrel	Stub barrel		N/A	N/A	001A8A92	X	X
	Short barrel	X	0018894A	000A7684	0015C836	X	X
	Short light barrel	000A7684	N/A	001483A6	0015C837	X	X
	Long barrel	X	00188948	000A767B	0015C833	X	X
	Long light barrel	X	N/A	000A767A	0015C834	X	X
	Ported barrel		0018894B
	Vented barrel		00188949
	Short ported barrel		0018894B	00178445	001651C4	X	X
	Long ported barrel		00188949	001483A7	001651C3	X	X
	Long light ported barrel		N/A
	Long finned barrel		N/A		00027F2E	X	X
Grip	Standard grip	X	N/A		001A8A93	X	X
	Comfort grip	X	N/A		0015C838	X	X
	Standard stock		N/A		0015C83B	X	X
	Sharpshooter's grip	X	N/A		0015C839	X	X
	Short stock		0018894E
	Full stock		0018894C
	Marksman's stock		00245F88		0015C83C	X	X
	Recoil compensating stock		0018894D		0015C83D	X	X
Magazine	Standard magazine	X	0018897A		001A8A94
	Large magazine	X	N/A		0015C840
	Quick eject mag	X	0018897B		001A8A95
	Large quick eject magazine	X	N/A		0015C841
	Drum magazine		00188978		0015C83E
	Quick eject drum mag		00188979		0015C83F
Sights	Standard sights	X	001A8A4D		001A8A97	X	X
	Glow sights	X	N/A		0015C85E	X	X
	Glow reflex sight		N/A		0022BA9E	X	X
	Reflex sight	X	00188967		0015C85D	X	X
	Reflex sight (circle)	X	001F425B
	Short scope		00188963		0015C85C	X	X
	Medium scope		00188961		0015C85B	X	X
	Long scope		0018895F		001916b3	X	X
	Short night vision scope		00188964		001916B6	X	X
	Medium night vision scope		00188962		001916B5	X	X
	Long night vision scope		00188960		001916B4	X	X
	Recon scope	X	N/A
	Short recon scope		002492D6		002492DF	X	X
	Long recon scope		00188966		001916B8	X	X
Muzzle	No muzzle
	Small bayonet		N/A		0015C845	X	X
	Large bayonet		N/A		0015C844	X	X
	Compensator	X	0018894F		0015C846	X	X
	Muzzle brake	X	001916A1		0015C847	X	X
	Suppressor	X	00188950		0015C848	X	X

Energy weapons

Weapon	Slot	Mod	AP Cost Change	Description	Req Rank	Base ID
Laser pistol	Capacitor	Standard capacitor	Unchanged	Standard.	None	0012ECED
		Photon exciter	unchanged	Improved critical shot damage and accuracy.	None	001877F1
		Beta wave tuner	Unchanged	Adds burning damage. Improved range.	None	001877F2
		Boosted capacitor	Unchanged	Improved damage. Reduced ammo capacity.	None	001877F3
		Photon agitator	Unchanged	Superior critical shot damage, accuracy and ammo capacity.	Science! 1	001877F4
		Gamma wave emitter	Unchanged	Adds better burning damage. Better range and ammo capacity.	Science! 1	001877F8
		Maximized capacitor	Unchanged	Better damage.	Science! 2	001877F6
		Boosted photon agitator	Unchanged	Superior critical shot damage and ammo capacity. Better accuracy. Improved damage.	Science! 2	001877F7
		Boosted gamma wave emitter	Unchanged	Adds better burning damage. Superior ammo capacity. Better range. Improved damage.	Science! 2	001877F8
		Overcharged capacitor	Unchanged	Superior damage. Improved ammo capacity.	Science! 3	001877F9
	Barrel	Short barrel	-10%		None	0009983D
		Long barrel	+10%	Better range, improved damage, sighted accuracy and recoil. Reduced ammo capacity. Poor hip-fire accuracy.	Science! 1	00091FB5
		Automatic barrel	+25%	Improved rate of fire, range and sighted accuracy. Worse recoil. Reduced ammo capacity. Poor hip-fire accuracy.	Science! 1	000997C9
		Sniper barrel	+35%	Superior damage and range. Worse recoil. Poor ammo capacity and hip-fire accuracy.	Science!	00099835
		Improved short barrel	-10%	Better damage.	Science! 1	001877E7
		Improved long barrel	+10%	Better damage and range. Improved sighted accuracy and recoil. Reduced ammo capacity. Poor hip-fire accuracy.	Science! 2	001877E6
		Improved automatic barrel	+25%	Superior rate of fire. Improved damage, range and sighted accuracy. Worse recoil. Reduced ammo capacity. Poor hip-fire accuracy.	Science! 2	001877E8
		Improved sniper barrel	+35%	Exceptional damage. Superior range. Worse recoil. Poor ammo capacity and hip-fire accuracy.	Science! 2	001877E9
	Grip	Standard grip	-10%	Standard.	None	00099836
		Comfort grip	-10%	Improved recoil and hip-fire accuracy.	None	001877EA
		Sharpshooter's grip	-15%	Better recoil and hip-fire accuracy.	Science! 1	001877EB
		Short stock	Unchanged	Exceptional sighted accuracy. Better recoil and aim with scopes. Improved bash.	None	00091FB7
		Full stock	+20%	Exceptional sighted accuracy. Better recoil and aim with scopes. Improved bash.	Science! 1	00091FB6
		Marksman's stock	+20%	Exceptional sighted accuracy. Superior recoil and aim with scopes. Improved bash.	Science! 2	001877ED
		Recoil compensating stock	+20%	Exceptional sighted accuracy and recoil. Better aim with scopes. Improved bash.	Science! 2	001877EC
	Sights	Standard sights	Unchanged	Standard.	None	001877FA
		Improved sights	-5%	Improved focus and sighted accuracy.	None	001877FB
		Short scope	+30%	Improved magnification. Superior sighted accuracy.	None	001877FD
		Reflex sight	-15%	Better focus and sighted accuracy.	Science! 1	001877FE
		Medium scope	+40%	Better magnification. Superior sighted accuracy	Science! 1	001877FC
		Long scope	+50%	Superior magnification and sighted accuracy.	Science! 2	000BDCF8
		Short night vision scope	+30%	Night vision. Improved magnification. Superior sighted accuracy	Science! 2	00187801
		Medium night vision scope	+40%	Night vision. Better magnification. Superior sighted accuracy.	Science! 2	00187800
		Long night vision scope	+50%	Night vision. Superior magnification and sighted accuracy.	Science! 2	001877FF
		Short recon scope	+30%	Tracks targets. Improved magnification. Superior sighted accuracy.	Science! 3	002492B4
		Long recon scope	+50%	Tracks targets. Superior magnification and sighted accuracy.	Science! 3	00187802
	Muzzle	No muzzle	Unchanged	Standard	None
		Beam splitter	Unchanged	Splits beam into multiple projectiles covering a wider area. Poor accuracy and range.	Science! 1	00020BD1
		Beam focuser	Unchanged	Better range, accuracy, and recoil.	Science! 1	000BDCF9
		Gyro compensating lens	Unchanged	Superior recoil. Reduced range.	Science! 1	000C38ED
		Amplified beam splitter	Unchanged	Splits beam into multiple projectiles covering a wider area. Reduced accuracy. Poor range.	Science! 2	001877F0
		Fine-tuned beam focuser	Unchanged	Super range and accuracy. Better recoil.	Science! 2	001877EF
		Quantum gyro compensating lens	Unchanged	Exceptional recoil. Reduced range.	Science! 3	001877EE
Plasma pistol	Capacitor	Standard capacitor	Unchanged	Standard.	None	00100AE6
		Beta wave tuner		Adds burning damage. Improved range.	?	0019ECC5
		Boosted capacitor		Improved damage. Reduced ammo capacity.	?	0019ECC6
		Photon exciter		Improved critical shot damage and accuracy.	?	0019ECC4
		Photon agitator		Superior critical shot damage. Better accuracy and ammo capacity.	Science! 2	0019ECC7
		Gamma wave emitter		Adds better burning damage. Better range and ammo capacity.	Science! 2	0019ECC8
		Maximized capacitor		Better damage.	Science! 2	0019ECC9
		Boosted photon agitator		Superior critical shot damage and ammo capacity. Better accuracy. Improved damage.	Science! 3	0019ECCA
		Boosted gamma wave emitter		Adds better burning damage. Superior ammo capacity. Better range. Improved damage.	Science! 3	0019ECCB
		Overcharged capacitor		Superior damage. Improved ammo capacity.	Science! 4	0019ECCC
	Barrel	Short barrel	-10%	Standard.	?	00127792
		Splitter		Fires multiple projectiles. Improved damage. Poor accuracy.	?	0010D531
		Automatic barrel	+25%	Improved rate of fire, range and sighted accuracy. Worse recoil. Reduced ammo capacity. Poor hip-fire accuracy.	Science! 1	00102B5C
		Sniper barrel	+35%	Superior damage and range. Worse recoil. Poor ammo capacity and hip-fire accuracy.	Science! 2	0010B9D6
		Flamer barrel	30%	Flame-thrower conversion.	Science! 2	0005E6D2
		Improved short barrel	-10%	Improved damage.	Science! 2	0019ECC0
		Improved splitter		Fires multiple projectiles. Better damage. Poor accuracy.	Science! 3	0019ECC1
		Improved automatic barrel		Superior rate of fire. Improved damage, range and sighted accuracy. Worse recoil. Reduced ammo capacity. Poor hip-fire accuracy.	Science! 3	0019ECC3
		Improved sniper barrel		Exceptional damage. Superior range. Worse recoil. Poor ammo capacity and hip-fire accuracy.	Science! 3	0019ECC2
	Grip	Standard grip		Standard.	?	00100AE7
		Comfort grip		Improves recoil and hip-fire accuracy.	?	00100AE7
		Standard stock		Exceptional sighted accuracy. Better recoil and aim with scopes. Improved bash.	Science! 2	00111F7C
		Marksman's stock		Exceptional sighted accuracy. Superior recoil and aim with scopes. Improved bash	Science! 3	0005E6CF
		Recoil compensating stock		Exceptional sighted accuracy and recoil. Better aim with scopes. Improved bash.	Science! 3	00108038
	Sights	Standard sights		Standard.	?	00188A1A
		Short scope		Improved magnification. Superior sighted accuracy.	?	001B6363
		Reflex sight		Better focus and sighted accuracy.	Science! 1	00115AB9
		Medium scope		Better magnification. Superior sighted accuracy	Science! 2	001B6361
		Long scope		Superior magnification and sighted accuracy.	Science! 2	001B635F
		Short night vision scope		Night vision. Improved magnification. Superior sighted accuracy	Science! 3	001B6364
		Medium night vision scope		Night vision. Better magnification. Superior sighted accuracy.	Science! 3	001B6362
		Long night vision scope		Night vision. Superior magnification and sighted accuracy.	Science! 3	001B6360
		Short recon scope		Tracks targets. Improved magnification. Superior sighted accuracy.	Science! 4	002492BA
		Long recon scope		Tracks targets. Superior magnification and sighted accuracy.	Science! 4	001357CF
Gamma gun	Barrel	Standard dish		Standard.	?	0014F6E6
		Deep dish		Better range and damage.	Science! 4	0014F6E7
	Grip	Standard grip		Standard.	?	001889D3
		Sharpshooter's grip		Better recoil and hip-fire accuracy.	Gun Nut 2	0014F6E8
	Muzzle
		Electric signal carrier antennae		Hold fire to charge additional electrical damage.	Science! 3	0014F6EA
		Signal repeater		Improved rate of fire.	Science! 4	0014F6E9

Melee weapons

Weapon	Slot	Mod	Description	Req Rank	Base ID
Baseball bat	Upgrade	Barbed wire	Armor piercing. Improved damage.	None	00182CD1
		Nails	Armor piercing. Better damage.	None	00182CCF
		Razors	Targets bleed. Better damage.	None	00182CD0
		Chains	Superior damage.	Blacksmith 1	00182CD4
		Saw blades	Targets bleed. Exceptional damage.	Blacksmith 2	00182CD3
	Material	Black	No effect	None	001A034B
		Blue	No effect	None	001A034C
		Cedar	No effect	None	001A0350
		Grey	No effect	None	001A034D
		Mahogany	No effect	None	001A034F
		Oak	No effect	None	001A0351
		Aluminum	Increased Damage	Blacksmith 1	001A001D

Other

Weapon	Slot	Mod	Description	Req Rank	Base ID
Junk Jet	Receiver	JunkJet receiver	Standard.	None	00111FFA
	Barrel	Short barrel	Standard.	None	0016048E
		Long barrel	Superior range and sighted accuracy. Better recoil. Poor hip-fire accuracy.	Gun Nut 1	00102D57
	Grip	Standard stock	Standard.	?	0016048F
		Recoil compensating stock	Exceptional recoil.	?	00160490
	Sights	Standard sights	Standard.	?	0023A554
		Gunner sight	Better focus and sighted accuracy	?	00160491
	Muzzle
		Electrification module	Adds electrical damage to projectiles.	Gun Nut 2	00102D59
		Ignition module	Adds fire damage to projectiles.	Gun Nut 3 Science! 1	00102D58

Notes

• Each time a new mod is built, the Sole Survivor receives a small amount of XP.
• Building weapon mods replaces the current mod applied to the weapon, the replaced weapon mod is stored in character's inventory. Attempting to craft a weapon mod, which is already present in the character's inventory, will apply the mod from the characters inventory instead of using material(no XP is earned).
• Mods stored in a workshop can be reused, and they will be available at all other settlements connected by a supply line. Mods can also be stored in containers.
• Every disassembled weapon mod has a weight of 0.5.
• Mods purchased from merchants may be reused an unlimited amount of times on as many suitable weapons as you wish. The breakdown resource value for the weapon will reflect the addition of the mod.
• Codsworth and Paladin Danse will love it when you create weapon mods, and Preston Garvey likes it when you do.
• Unlike armor modifications, most weapon mods cannot simply be removed from a weapon except for muzzle modifications. They must be replaced with an available or a newly created modification before the desired mod will be put into the Sole Survivor's inventory. Should the Sole Survivor not have the skill or resources to create the higher tier mods, the mod on an acquired weapon may be replaced with standard mods with fewer resources expended and no skills required.
• Each mod may have up to eight qualities describing the magnitude of the mods effect on weapon stats. These qualities are always sorted in descending order in the mods description, ranging from big bonus to big penalty: Exceptional - Superior - Better - Improved - (Standard) - Worse - Reduced - Inferior - Poor