7 Days to Die Weapon Mods — and Every Other Mod
94 mods in the game files: 42 fit weapons, and the rest go on tools, armor, vehicles and the drone. A mod fits when the item carries one of its install tags and none of its blocked tags — that is how each list below is worked out. The Hunter Mod fits the most weapons (42). 75 have a recipe; the rest come only from loot and traders.
Weapon mods
Guns, bows and melee weapons only.

Barrel Extender Mod
14 weapons · removable
“Increases damage, range, and aimed accuracy, but makes the weapon more unwieldy when fired from the hip.”
Damage falloff range +20% Range +20% Spread from the hip +10% Spread when aiming −5% Spread when aiming(conditional) −5% Vertical recoil +10% Horizontal recoil +5% Weapon handling(conditional) −8% Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle and 2 more
Get it: craft at the Workbench from 10 Forged Steel + 5 Scrap Polymers + 2 Oil + 2 Mechanical Parts (unlocked by Barrel Extender Mod Schematic); loot from 24 kinds of container; traders

Muzzle Brake Mod
14 weapons · removable
“Diverts the propellant gases to reduce recoil.”
Vertical recoil −25% Horizontal recoil −15% Weapon handling +8% Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle and 2 more
Get it: craft at the Workbench from 10 Forged Iron + 5 Scrap Polymers + 2 Oil + 2 Mechanical Parts (unlocked by Muzzle Brake Mod Schematic); loot from 24 kinds of container; traders

Silencer Mod
17 weapons · removable
“A sound suppressor greatly reduces the firing sound, but reduces maximum range and damage. Works best with small calibers and guns with a low rate of fire.”
Damage(conditional) −15% Damage falloff range −20% Range −25% Plus 1 scripted effect that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun, Pipe Rifle, Hunting Rifle, Lever Action Rifle and 5 more
Get it: craft at the Workbench from 10 Forged Steel + 5 Scrap Polymers + 2 Oil + 2 Mechanical Parts (unlocked by Silencer Mod Schematic); loot from 24 kinds of container; traders; quest reward

Laser Sight Mod
20 weapons · removable
“Helps with aiming quickly and increases accuracy when firing from the hip. Installs into any firearm or crossbow.”
Spread from the hip −20% Weapon handling +20% Plus 10 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun, Pipe Rifle, Hunting Rifle, Lever Action Rifle and 8 more
Get it: craft at the Workbench from 10 Forged Steel + 2 Glue + 10 Electrical Parts + 2 Mechanical Parts (unlocked by Laser Sight Mod Schematic); loot from 24 kinds of container; traders

Weapon Flashlight Mod
20 weapons · removable
“Installs into any firearm or crossbow.”
Plus 10 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun, Pipe Rifle, Hunting Rifle, Lever Action Rifle and 8 more
Get it: craft at the Workbench from 10 Scrap Polymers + 2 Glue + 5 Electrical Parts + 1 Flashlight (unlocked by Weapon Flashlight Mod Schematic); loot from 24 kinds of container; traders

Scope 2x Mod
15 weapons · removable
“Increases visual magnification when aiming. Installs into small firearms and crossbows.”
Spread when aiming −10% Spread when aiming(conditional) −10% Damage(conditional) +10% Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle and 3 more
Get it: craft at the Workbench from 2 Lens + 10 Forged Iron + 5 Scrap Polymers + 2 Glue (unlocked by Scope 2x Mod Schematic); loot from 24 kinds of container; traders

Scope 4x Mod
10 weapons · removable
“Increases visual magnification when aiming. Installs into medium sized firearms and crossbows.”
Spread when aiming −18% Spread when aiming(conditional) −18% Damage(conditional) +10% Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle, M60 Machine Gun, Iron Crossbow, Compound Crossbow
Get it: craft at the Workbench from 4 Lens + 10 Forged Steel + 8 Scrap Polymers + 3 Glue (unlocked by Scope 4x Mod Schematic); loot from 24 kinds of container; traders

Scope 8x Mod
4 weapons · removable
“Increases visual magnification when aiming. Installs into long rifles.”
Spread when aiming −25% Spread when aiming(conditional) −25% Damage(conditional) +10% Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle
Get it: craft at the Workbench from 8 Lens + 10 Forged Steel + 10 Scrap Polymers + 5 Glue (unlocked by Scope 8x Mod Schematic); loot from 24 kinds of container; traders

Reflex Sight Mod
18 weapons · removable
“This sight is designed for fast target acquisition and improves weapon handling.”
Weapon handling +30% Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Pipe Pistol, Pistol, SMG-5, .44 Magnum, .44 Desert Vulture, Pipe Shotgun, Pump Shotgun, Auto Shotgun, Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle and 6 more
Get it: craft at the Workbench from 10 Forged Steel + 10 Scrap Polymers + 5 Glue + 10 Electrical Parts (unlocked by Reflex Sight Mod Schematic); loot from 24 kinds of container; traders

Trigger Group: Semi Mod
8 weapons · removable
“Modifies the trigger group to fire semi-auto only. Increases the rate of fire and slightly increases recoil.”
Rounds per burst set to 1 Rounds per minute +10% Spread growth per shot +5% Weapons: Pistol, SMG-5, .44 Desert Vulture, Auto Shotgun, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle
Get it: craft at the Workbench from 5 Forged Iron + 5 Scrap Polymers + 5 Glue + 10 Mechanical Parts (unlocked by Trigger Group: Semi Mod Schematic); loot from 24 kinds of container; traders

Trigger Group: Burst Mod
8 weapons · removable
“Modifies the trigger group to fire 3 round bursts. Increases the rate of fire and slightly increases recoil.”
Rounds per burst set to 3 Rounds per minute +10% Spread growth per shot +5% Weapons: Pistol, SMG-5, .44 Desert Vulture, Auto Shotgun, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle
Get it: craft at the Workbench from 5 Forged Steel + 5 Scrap Polymers + 5 Glue + 10 Mechanical Parts (unlocked by Trigger Group: Burst Mod Schematic); loot from 24 kinds of container; traders

Trigger Group: Full Auto Mod
8 weapons · removable
“Modifies the trigger group to fire full auto only. Increases the rate of fire and slightly increases recoil.”
Rounds per burst set to 0 Rounds per minute +12% Spread growth per shot +6% Weapons: Pistol, SMG-5, .44 Desert Vulture, Auto Shotgun, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle
Get it: craft at the Workbench from 5 Forged Steel + 5 Scrap Polymers + 5 Glue + 10 Mechanical Parts (unlocked by Trigger Group: Full Auto Mod Schematic); loot from 24 kinds of container; traders

Bipod Mod
10 weapons · removable
“Increases accuracy and handling when aiming weapons.”
Spread when aiming −8% Spread when aiming(conditional) −9% Spread while walking +5% Spread from the hip +5% Weapon handling −5% Weapon handling(conditional) +35% Weapons: Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle, M60 Machine Gun, Iron Crossbow, Compound Crossbow
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Bipod Mod Schematic); loot from 24 kinds of container; traders

Fore Grip Mod
15 weapons · removable
“Improves handling and accuracy when firing weapons from the hip or while moving.”
Spread while crouching −15% Spread from the hip −15% Spread while walking −15% Weapon handling +13% Weapon handling(conditional) −8% Vertical recoil −50% Horizontal recoil −50% Weapons: SMG-5, Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun, Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle and 3 more
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Fore Grip Mod Schematic); loot from 24 kinds of container; traders

Retracting Stock Mod
11 weapons · removable
“Improves weapon handling while moving or firing from the hip because the weapon becomes more manageable in close quarters.”
Spread from the hip −15% Weapons: Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun, Pipe Rifle, Hunting Rifle, Lever Action Rifle, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Retracting Stock Mod Schematic); loot from 24 kinds of container; traders

Sawed-Off Shotgun Mod
3 weapons · removable
“Increases projectile spread.”
Range −15% Damage falloff range −15% Vertical spread ×1.2 Horizontal spread ×1.2 Weapons: Pipe Shotgun, Pump Shotgun, Auto Shotgun
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Sawed-off Shotgun Mod Schematic); loot from 24 kinds of container; traders

Shotgun Duckbill Mod
4 weapons · removable
“Modifies the spread to a horizontal pattern instead of the normal round one.”
Vertical spread −45% Horizontal spread +75% Weapons: Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Shotgun Duckbill Mod Schematic); loot from 24 kinds of container; traders

Shotgun Choke Mod
4 weapons · removable
“Tightens the shotgun's spread.”
Vertical spread −40% Horizontal spread −40% Weapons: Pipe Shotgun, Double Barrel Shotgun, Pump Shotgun, Auto Shotgun
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Shotgun Choke Mod Schematic); loot from 24 kinds of container; traders

Magazine Extender Mod
9 weapons · removable
“Increases magazine capacity.”
Magazine size +10% at Q1 → +60% at Q6 Weapons: Pistol, SMG-5, .44 Desert Vulture, Auto Shotgun, Sniper Rifle, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle, M60 Machine Gun
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Magazine Extender Mod Schematic); loot from 24 kinds of container; traders

Drum Magazine Mod
6 weapons · removable
“This large drum magazine increases the ammo capacity on machine guns, but is a little slower to reload.”
Magazine size +50% at Q1 → +100% at Q6 Reload speed −25% at Q1 → +0% at Q6 Weapons: SMG-5, Auto Shotgun, Pipe Machine Gun, KV-47 Machine Gun, Tactical Assault Rifle, M60 Machine Gun
Get it: craft at the Workbench from 20 Forged Steel + 10 Scrap Polymers + 4 Oil + 4 Mechanical Parts (unlocked by perkAutoWeaponsDrumMag); loot from 24 kinds of container; traders; quest reward

Shotgun Tube Extender Mod
1 weapon · removable
“Increases magazine capacity for pump shotguns.”
Magazine size +2 at Q1 → +12 at Q6 Weapons: Pump Shotgun
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by perkShotgunMessiahMagazine); loot from 24 kinds of container; traders; quest reward

Cripple 'Em Mod
23 weapons · removable
“Each shot has a chance to cripple a leg on a bipedal target.”
Plus 9 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: every ranged weapon (23)
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Cripple 'Em Mod Schematic); loot from 24 kinds of container; traders; quest reward

Polymer String Mod
5 weapons · removable
“Arrows and Bolts fly quicker and further with this modification.”
Projectile velocity +5% at Q1 → +30% at Q6 Weapons: Primitive Bow, Wooden Bow, Compound Bow, Iron Crossbow, Compound Crossbow
Get it: craft at the Workbench from 50 Scrap Polymers + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Polymer String Mod Schematic); loot from 24 kinds of container; traders

Arrow Rest Mod
3 weapons · removable
“An arrow rest improves the accuracy of a bow.”
Spread when aiming −2% at Q1 → −15% at Q6 Spread from the hip −2% at Q1 → −15% at Q6 Weapons: Primitive Bow, Wooden Bow, Compound Bow
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Arrow Rest Mod Schematic); loot from 24 kinds of container

Barbed Wire Mod
4 weapons · removable
“Has a chance to cause bleeding damage with primary attacks. Greater chance with power attacks. Can be installed in clubs.”
Plus 16 scripted effects that fire on events (hits, equipping), applying Bleeding — not summarised here.
Weapons: Wooden Club, Baseball Bat, Candy Cane Club, Steel Club
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Barbed Wire Mod Schematic); loot from 24 kinds of container; traders

Metal Spikes Mod
4 weapons · removable
“Each successive hit lowers enemies armor rating. Can be installed in clubs.”
Plus 14 scripted effects that fire on events (hits, equipping), applying Shredded Armor — not summarised here.
Weapons: Wooden Club, Baseball Bat, Candy Cane Club, Steel Club
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Metal Spikes Mod Schematic); loot from 24 kinds of container; traders

Metal Chain Mod
4 weapons · removable
“Has a chance to knock down opponents. Can be installed in clubs.”
Plus 7 scripted effects that fire on events (hits, equipping), applying Knockdown — not summarised here.
Weapons: Wooden Club, Baseball Bat, Candy Cane Club, Steel Club
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by perkBatterUpMetalChain); loot from 24 kinds of container

Stun Baton Repulsor Mod
1 weapon · removable
“Install this mod into a stun baton and send zombies flying on the charged hit.”
Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Stun Baton
Get it: craft at the Workbench from 5 Forged Steel + 5 Duct Tape + 10 Electrical Parts + 5 Mechanical Parts (unlocked by perkTechJunkie5Repulsor); not in loot or trader lists
Weapon and tool mods
Fit weapons and tools alike — most of the melee mods.

The Hunter Mod
42 weapons · 15 tools · removable
“Do more damage to all animals.”
Damage(conditional) +5% at Q1 → +30% at Q6 Weapons: every weapon (42)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by The Hunter Mod Schematic); loot from 24 kinds of container; traders

Rad Remover Mod
42 weapons · 15 tools · removable
“Temporarily disables the regeneration ability of Radiated, Charged, and Infernal zombies.”
Plus 6 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: every weapon (42)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Rad Remover Mod Schematic); loot from 24 kinds of container; traders; quest reward

Tempered Blade Mod
8 weapons · 15 tools · removable
“This blade modification increases block damage and lowers degradation.”
Block damage +5% at Q1 → +30% at Q6 Durability loss per use −4% at Q1 → −15% at Q6 Weapons: Bone Knife, Hunting Knife, Candy Cane Knife, Machete, Stone Spear, Iron Spear, Steel Spear, Steel Knuckles
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Tempered Blade Schematic); loot from 24 kinds of container; traders

Serrated Blade Mod
8 weapons · 7 tools · removable
“Has a chance to cause a Bleeding Wound on a regular attack.”
Plus 7 scripted effects that fire on events (hits, equipping), applying Bleeding — not summarised here.
Weapons: Bone Knife, Hunting Knife, Candy Cane Knife, Machete, Stone Spear, Iron Spear, Steel Spear, Steel Knuckles
Tools: Stone Axe, Taza's Stone Axe, Iron Fireaxe, Steel Axe, Stone Shovel, Iron Shovel, Steel Shovel
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Serrated Blade Mod Schematic); loot from 24 kinds of container; traders

Weighted Head Mod
15 weapons · 15 tools · removable
“A modification for all melee weapons and tools. Adds a chance to stun and slow victims. Knives and machetes do not have a head that can be weighted.”
Plus 6 scripted effects that fire on events (hits, equipping), applying Stunned — not summarised here.
Weapons: Wooden Club, Baseball Bat, Candy Cane Club, Steel Club, Pipe Baton, Stun Baton, Stone Spear, Iron Spear, Steel Spear, Stone Sledgehammer, Iron Sledgehammer, Steel Sledgehammer and 3 more
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Weighted Head Mod Schematic); loot from 24 kinds of container; traders

Structural Brace Mod
24 weapons · 15 tools · removable
“This modification lowers degradation for melee weapons, tools, and bows.”
Durability loss per use −5% at Q1 → −30% at Q6 Weapons: Bone Knife, Hunting Knife, Candy Cane Knife, Machete, Wooden Club, Baseball Bat, Candy Cane Club, Steel Club, Pipe Baton, Stun Baton, Stone Spear, Iron Spear and 12 more
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Structural Brace Mod Schematic); loot from 24 kinds of container; traders

Ergonomic Grip Mod
22 weapons · 15 tools · removable
“Decreases melee stamina usage and increases weapon handling of bows.”
Stamina per hit(conditional) −5% at Q1 → −30% at Q6 Weapon handling(conditional) +2% at Q1 → +15% at Q6 Weapons: Bone Knife, Hunting Knife, Candy Cane Knife, Machete, Wooden Club, Baseball Bat, Candy Cane Club, Steel Club, Pipe Baton, Stun Baton, Stone Spear, Iron Spear and 10 more
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Ergonomic Grip Mod Schematic); loot from 24 kinds of container; traders

Fortifying Grip Mod
19 weapons · 15 tools · removable
“When below 50% health, regenerate health over time.”
Health regeneration(conditional) scripted Plus 6 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: every melee weapon (19)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Fortifying Grip Mod Schematic); loot from 24 kinds of container; traders

Burning Shaft Mod
11 weapons · 10 tools · removable
“A melee item can triple as a light source, set enemies on fire, and used as a source of heat. Can be installed in melee tools and weapons that have a long shaft or blade.”
Light +0.28 Cold resistance(conditional) +20 Plus 20 scripted effects that fire on events (hits, equipping) — not summarised here.
Weapons: Machete, Wooden Club, Baseball Bat, Candy Cane Club, Steel Club, Stone Spear, Iron Spear, Steel Spear, Stone Sledgehammer, Iron Sledgehammer, Steel Sledgehammer
Tools: Stone Axe, Taza's Stone Axe, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Wrench
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Oil + 50 Gas Can (unlocked by Burning Shaft Mod Schematic); loot from 24 kinds of container; traders

Grave Digger Mod
19 weapons · 15 tools · removable
“Does more damage against dirt.”
Damage vs earth +5% at Q1 → +30% at Q6 Weapons: every melee weapon (19)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Grave Digger Mod Schematic); loot from 24 kinds of container; traders

Bunker Buster Mod
19 weapons · 15 tools · removable
“Does more damage against stone.”
Damage vs stone +5% at Q1 → +30% at Q6 Weapons: every melee weapon (19)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Bunker Buster Mod Schematic); loot from 24 kinds of container; traders

Iron Breaker Mod
19 weapons · 15 tools · removable
“Does more damage against iron.”
Damage vs metal +5% at Q1 → +30% at Q6 Weapons: every melee weapon (19)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Iron Breaker Mod Schematic); loot from 24 kinds of container; traders

Wood Splitter Mod
19 weapons · 15 tools · removable
“Does more damage against wood.”
Damage vs wood +5% at Q1 → +30% at Q6 Weapons: every melee weapon (19)
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by Wood Splitter Mod Schematic); loot from 24 kinds of container; traders

Diamond Blade Tip Mod
8 weapons · 15 tools · removable
“Any hand tool or bladed weapon degrades slower with this modification.”
Durability loss per use −5% at Q1 → −30% at Q6 Weapons: Bone Knife, Hunting Knife, Candy Cane Knife, Machete, Stone Spear, Iron Spear, Steel Spear, Steel Knuckles
Tools: Stone Axe, Taza's Stone Axe, Claw Hammer, Iron Fireaxe, Steel Axe, Iron Pickaxe, Steel Pickaxe, Stone Shovel, Iron Shovel, Steel Shovel, Chainsaw, Auger, Wrench, Ratchet, Impact Driver
Get it: craft at the Workbench from 5 Forged Steel + 5 Glue + 5 Mechanical Parts + 3 Raw Diamond (unlocked by perkArtOfMiningDiamondTools); loot from 24 kinds of container; traders
Tool mods
Only tools take these.

Fireman's Axe Mod
4 tools · removable
“Deal more damage to blocks, but less damage to enemies.”
Block damage +5% at Q1 → +30% at Q6 Damage −5% at Q1 → −30% at Q6 Tools: Stone Axe, Taza's Stone Axe, Iron Fireaxe, Steel Axe
Get it: craft at the Workbench from 5 Forged Iron + 5 Glue + 5 Mechanical Parts + 10 Spring (unlocked by perkFiremansAlmanacAxes); loot from 1 kinds of container; traders

Motor Tool Small Tank Mod
2 tools · removable
“Moderately increases tank size for chainsaws and augers.”
Magazine size +10% at Q1 → +60% at Q6 Get it: craft at the Workbench from 5 Forged Steel + 2 Scrap Polymers + 2 Duct Tape + 10 Gas Can (unlocked by Motor Tool Small Tank Mod Schematic); loot from 24 kinds of container; traders

Motor Tool Large Tank Mod
2 tools · removable
“Greatly increases tank size for chainsaws and augers.”
Magazine size +60% at Q1 → +200% at Q6 Get it: craft at the Workbench from 5 Forged Steel + 2 Scrap Polymers + 2 Duct Tape + 10 Gas Can (unlocked by Motor Tool Large Tank Mod Schematic); loot from 24 kinds of container; traders
Armor mods
Armor pieces; some only fit one slot or are blocked on light or heavy armor.

Tattered Insulated Armor Mod
64 armor pieces · removable
“Increases Hot and Cold Resist”
Cold resistance +1 at Q1 → +2.5 at Q6 Heat resistance +1 at Q1 → +2.5 at Q6 Armor: every set (64 pieces)
Get it: loot from 12 kinds of container; traders

Patchwork Insulated Armor Mod
64 armor pieces · removable
“Increases Hot and Cold Resist”
Cold resistance +2.8 at Q1 → +4.3 at Q6 Heat resistance +2.8 at Q1 → +4.3 at Q6 Armor: every set (64 pieces)
Get it: loot from 12 kinds of container; traders

ThermaCore Insulated Armor Mod
64 armor pieces · removable
“Increases Hot and Cold Resist”
Cold resistance +4.6 at Q1 → +6 at Q6 Heat resistance +4.6 at Q1 → +6 at Q6 Armor: every set (64 pieces)
Get it: loot from 12 kinds of container; traders

Bandolier Mod
16 armor pieces · removable
“Reload faster.”
Plus 8 scripted effects that fire on events (hits, equipping) — not summarised here.
Armor: every set (16 pieces)
Get it: craft at the Workbench from 100 Cloth Fragment + 2 Scrap Polymers + 15 Leather + 3 Glue + 1 Sewing Kit (unlocked by Bandolier Mod Schematic); loot from 12 kinds of container; traders; quest reward

Armor Fittings Mod
40 armor pieces · removable
“Decreases movement and stamina penalties from armor. Cannot be installed into Light Armor.”
Mobility +2% Stamina regeneration (walking) +1.4% Stamina regeneration (running) +2.8% Armor: Assassin, Biker, Commando, Farmer, Miner, Nerd, Nomad, Raider, Ranger, Scavenger
Get it: craft at the Workbench from 10 Scrap Polymers + 4 Leather + 1 Duct Tape + 4 Mechanical Parts + 1 Sewing Kit (unlocked by Armor Fittings Mod Schematic); loot from 12 kinds of container; traders

Advanced Armor Fittings Mod
40 armor pieces · removable
“Greatly decreases movement and stamina penalties from armor. Cannot be installed into Light Armor.”
Mobility +3% Stamina regeneration (walking) +2.1% Stamina regeneration (running) +5.62% Armor: Assassin, Biker, Commando, Farmer, Miner, Nerd, Nomad, Raider, Ranger, Scavenger
Get it: craft at the Workbench from 20 Scrap Polymers + 8 Leather + 2 Duct Tape + 8 Mechanical Parts + 1 Sewing Kit (unlocked by Advanced Armor Fittings Mod Schematic); loot from 12 kinds of container; traders

Armor Plating Mod
48 armor pieces · removable
“Improve your armor rating with these additional armor plates. Cannot be installed into Heavy Armor.”
Armor rating +1 Armor: Assassin, Athletic, Biker, Commando, Enforcer, Farmer, Lumberjack, Preacher, Primitive, Ranger, Rogue, Scavenger
Get it: craft at the Workbench from 2 Leather + 5 Scrap Polymers + 1 Duct Tape + 2 Mechanical Parts + 1 Sewing Kit (unlocked by Armor Plating Mod Schematic); loot from 12 kinds of container; traders

Advanced Armor Plating Mod
48 armor pieces · removable
Armor rating +2 Armor: Assassin, Athletic, Biker, Commando, Enforcer, Farmer, Lumberjack, Preacher, Primitive, Ranger, Rogue, Scavenger
Get it: craft at the Workbench from 10 Forged Iron + 10 Scrap Polymers + 2 Duct Tape + 4 Mechanical Parts + 1 Sewing Kit (unlocked by Advanced Armor Plating Mod Schematic); loot from 12 kinds of container; traders

Armor Pocket Mod
64 armor pieces · removable
“Decrease encumbrance penalty by 1 by installing this modification into your armor.”
Carry capacity +1 Armor: every set (64 pieces)
Get it: craft at the Workbench from 10 Scrap Polymers + 6 Leather + 1 Duct Tape + 4 Mechanical Parts + 1 Sewing Kit (unlocked by Armor Pocket Mod Schematic); loot from 12 kinds of container; traders

Armor Double Pocket Mod
64 armor pieces · removable
“Decrease encumbrance penalty by 2 by installing this modification into your armor.”
Carry capacity +2 Armor: every set (64 pieces)
Get it: craft at the Workbench from 15 Scrap Polymers + 8 Leather + 2 Duct Tape + 4 Mechanical Parts + 2 Sewing Kit (unlocked by Armor Double Pocket Mod Schematic); loot from 12 kinds of container; traders

Armor Triple Pocket Mod
64 armor pieces · removable
“Decrease encumbrance penalty by 3 by installing this modification into your armor.”
Carry capacity +3 Armor: every set (64 pieces)
Get it: craft at the Workbench from 20 Scrap Polymers + 10 Leather + 3 Duct Tape + 4 Mechanical Parts + 3 Sewing Kit (unlocked by Armor Triple Pocket Mod Schematic); loot from 12 kinds of container; traders; quest reward

Armor Quad Pocket Mod
64 armor pieces · removable
“Decrease encumbrance penalty by 4 by installing this modification into your armor.”
Carry capacity +4 Armor: every set (64 pieces)
Get it: craft at the Workbench from 40 Scrap Polymers + 20 Leather + 6 Duct Tape + 6 Sewing Kit + 1 Legendary Parts (unlocked by Armor Quad Pocket Mod Schematic); quest reward

Muffled Connectors Mod
36 armor pieces · removable
“Reduces noise from armor. Cannot be installed into Light or Assassin Armor.”
Noise −5% Armor: Biker, Commando, Farmer, Miner, Nerd, Nomad, Raider, Ranger, Scavenger
Get it: craft at the Workbench from 4 Forged Steel + 30 Scrap Polymers + 1 Duct Tape + 4 Mechanical Parts + 1 Sewing Kit (unlocked by Muffled Connectors Mod Schematic); loot from 12 kinds of container; traders

Advanced Muffled Connectors Mod
36 armor pieces · removable
“Greatly reduced noise from armor. Cannot be installed into Light or Assassin Armor.”
Noise −10% Armor: Biker, Commando, Farmer, Miner, Nerd, Nomad, Raider, Ranger, Scavenger
Get it: craft at the Workbench from 5 Forged Steel + 60 Scrap Polymers + 2 Duct Tape + 5 Mechanical Parts + 1 Sewing Kit (unlocked by Adv. Muffled Connectors Mod Schematic); loot from 12 kinds of container; traders

Impact Bracing Mod
16 armor pieces · removable
“Reduces fall damage.”
Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Armor: every set (16 pieces)
Get it: craft at the Workbench from 5 Forged Steel + 2 Duct Tape + 20 Mechanical Parts + 20 Spring + 1 Sewing Kit (unlocked by Impact Bracing Mod Schematic); loot from 12 kinds of container; traders; quest reward

Stealth Boots Mod
10 armor pieces · removable
“Reduces the noise and stamina penalties of medium and heavy boots.”
Stamina regeneration (walking) +3% Stamina regeneration (running) +10% Noise −10% Armor: Assassin, Biker, Commando, Farmer, Miner, Nerd, Nomad, Raider, Ranger, Scavenger
Get it: craft at the Workbench from 5 Forged Steel + 60 Scrap Polymers + 2 Duct Tape + 5 Mechanical Parts + 1 Sewing Kit (unlocked by perkUrbanCombatLanding); quest reward

Water Purifier Mod
16 armor pieces · removable
“Allows safe consumption of murky water.”
Buff resistance(conditional) +1 Plus 2 scripted effects that fire on events (hits, equipping) — not summarised here.
Armor: every set (16 pieces)
Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 2 Duct Tape + 30 Coal + 1 Sewing Kit (unlocked by Water Purifier Mod Schematic); loot from 12 kinds of container; traders; quest reward

Helmet Light Mod
16 armor pieces · removable
“A light source that can be installed into any head armor.”
Plus 7 scripted effects that fire on events (hits, equipping) — not summarised here.
Armor: every set (16 pieces)
Get it: craft at the Workbench from 5 Forged Steel + 2 Scrap Polymers + 2 Duct Tape + 1 Sewing Kit + 1 Flashlight (unlocked by Helmet Light Mod Schematic); loot from 12 kinds of container; traders; quest reward

Cigar Mod
16 armor pieces · removable
“Look intimidating and get a better deal from traders. Also boosts strength!”
Strength level +1 Bartering, buying +0.05 at Q1 → +0.1 at Q6 Bartering, selling +0.05 at Q1 → +0.1 at Q6 Armor: every set (16 pieces)
Get it: craft at the Backpack from 250 Plant Fibers + 1 Paper + 1 Testosterone Extract (unlocked by perkUrbanCombatCigar); loot from 15 kinds of container; traders; quest reward

Perception Mod
16 armor pieces · removable
“When installed in headgear, these AI enabled contact lenses enhance sight and targeting. +1 Perception”
Perception level +1 Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward

Strength Mod
16 armor pieces · removable
“This AI neural chip, designed for installation in headgear, bypasses myostatin to enhance strength. +1 Strength”
Strength level +1 Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward

Fortitude Mod
16 armor pieces · removable
“This AI-enhanced neural interface boosts the immune system when integrated into headgear. +1 Fortitude”
Fortitude level +1 Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward

Agility Mod
16 armor pieces · removable
“This AI-driven neural interface, when embedded in headgear, greatly accelerates nerve signal transmission. +1 Agility”
Agility level +1 Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward

Intellect Mod
16 armor pieces · removable
“This handy AI headgear companion gives you archived information from before the apocalypse to stimulate intelligence. +1 Intellect”
Intellect level +1 Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward

Treasure Hunter's Mod
16 armor pieces · removable
“This AI-enhanced headgear mod boosts learning speed and improves the user's ability to discover valuable loot and buried treasures.”
Loot stage +1 at Q1 → +6 at Q6 XP gain +5% at Q1 → +30% at Q6 Treasure blocks per reduction −1 at Q1 → −2 at Q6 Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward

Night Vision Mod
16 armor pieces · removable
“See in the dark with this high tech night vision head armor mod.”
Plus 5 scripted effects that fire on events (hits, equipping) — not summarised here.
Armor: every set (16 pieces)
Get it: loot from 12 kinds of container; traders; quest reward
Vehicle mods
Bicycle to gyrocopter — which vehicle takes which is listed per mod.

Vehicle Fuel Saver Mod
4 vehicles · removable
“Vehicles consume less fuel.”
Vehicle fuel use ×0.9 at Q1 → ×0.4 at Q6 Vehicles: Minibike, Motorcycle, 4x4 Truck, Gyrocopter
Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 4 Bottle of Acid + 4 Mechanical Parts (unlocked by Vehicle Fuel Saver Mod Schematic); loot from 2 kinds of container; traders

Vehicle Off Road Headlights Mod
5 vehicles · removable
“These off road headlights will brighten the path even on the darkest of nights.”
Light intensity ×2.2 Vehicles: Bicycle, Minibike, Motorcycle, 4x4 Truck, Gyrocopter
Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 4 Electrical Parts + 4 Headlight (unlocked by Vehicle Off Road Headlights Mod Schematic); loot from 2 kinds of container; traders

Vehicle Super Charger Mod
4 vehicles · removable
“This super charger mod Increases vehicle acceleration and top speed.”
Vehicle torque +12% Vehicle top speed +18% Vehicles: Minibike, Motorcycle, 4x4 Truck, Gyrocopter
Get it: craft at the Workbench from 10 Forged Steel + 10 Short Iron Pipe + 1 Brass Radiator + 4 Mechanical Parts (unlocked by Vehicle Super Charger Mod Schematic); loot from 2 kinds of container; traders

Vehicle Expanded Seating Mod
3 vehicles · removable
“Expand your seating capacity in vehicles with this mod.”
Vehicle seats +2 Vehicles: Minibike, Motorcycle, 4x4 Truck
Get it: craft at the Workbench from 5 Forged Steel + 100 Cloth Fragment + 4 Leather + 4 Spring (unlocked by Vehicle Expanded Seating Mod Schematic); loot from 2 kinds of container; traders

Vehicle Reserve Fuel Tank Mod
4 vehicles · removable
“Increase your vehicle's fuel storage with this mod.”
Vehicle fuel tank ×1.5 at Q1 → ×2 at Q6 Vehicles: Minibike, Motorcycle, 4x4 Truck, Gyrocopter
Get it: craft at the Workbench from 5 Forged Steel + 5 Duct Tape + 10 Scrap Polymers + 4 Mechanical Parts (unlocked by Vehicle Reserve Fuel Tank Mod Schematic); loot from 2 kinds of container; traders

Vehicle Plow Mod
1 vehicle · removable
“A rugged 4x4 plow. Perfect for clearing paths through hordes of zombies. Reduces the damage taken when objects hit the front of the 4x4. Increases damage to blocks and entities.”
Vehicle damage to creatures +60% Vehicle damage to blocks +56% Vehicle self-damage ×0.25 Vehicles: 4x4 Truck
Get it: craft at the Workbench from 10 Forged Steel + 10 Short Iron Pipe + 10 Scrap Polymers + 4 Mechanical Parts (unlocked by Vehicle Plow Mod Schematic); loot from 2 kinds of container; traders

Vehicle Armor Mod
2 vehicles · removable
“Reinforced armor for motorcycles and gyrocopters. Reduces the damage taken when objects hit the front of the vehicle. Increases damage to blocks and entities.”
Vehicle damage to creatures +50% Vehicle damage to blocks +38% Vehicle self-damage ×0.3 Vehicles: Motorcycle, Gyrocopter
Get it: craft at the Workbench from 10 Forged Steel + 10 Short Iron Pipe + 10 Scrap Polymers + 4 Mechanical Parts (unlocked by Vehicle Armor Mod Schematic); not in loot or trader lists

Vehicle Storage Mod
5 vehicles · removable
“Increase your vehicle storage capacity with this modification. Add up to two mods per vehicle.”
Vehicles: Bicycle, Minibike, Motorcycle, 4x4 Truck, Gyrocopter
Get it: craft at the Workbench from 10 Forged Iron + 20 Scrap Polymers + 10 Leather + 8 Mechanical Parts (unlocked by Vehicle Storage Mod Schematic); loot from 2 kinds of container; traders
Drone mods
For the robotic drone companion.

Robotic Drone Armor Plating Mod
the drone · removable
“Upgrade your robotic drone's defensive ability with this modification. Reduces damage and degradation by 50%.”
Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 4 Electrical Parts + 4 Mechanical Parts (unlocked by Robotic Drone Armor Plating Mod Schematic); loot from 2 kinds of container

Robotic Drone Cargo Mod
the drone · removable
“Increase your drones storage capacity with this modification. Add more for additional storage.”
Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 4 Electrical Parts + 4 Mechanical Parts (unlocked by Robotic Drone Cargo Mod Schematic); loot from 2 kinds of container

Robotic Drone Morale Booster Mod
the drone · removable
“Stamina regeneration is increased by 10% when near the drone with this mod installed.”
Get it: craft at the Workbench from 5 Forged Steel + 100 Cloth Fragment + 4 Electrical Parts + 4 Mechanical Parts (unlocked by Robotic Drone Morale Booster Mod Schematic); loot from 2 kinds of container

Robotic Headlamp Mod
the drone · removable
“This robotic drone modification adds a headlamp to your drone to improve visibility in dark spaces.”
Get it: craft at the Workbench from 5 Forged Steel + 1 Headlight + 4 Electrical Parts + 4 Mechanical Parts (unlocked by Robotic Headlamp Mod Schematic); loot from 2 kinds of container

Robotic Drone Medic Mod
the drone · removable
“Modify your drone into a robotic field medic that will automatically heal you as long as medical bandages or first aid kits are in its inventory.”
Range set to 4 Cooldown set to 15 Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 4 Electrical Parts + 4 Mechanical Parts (unlocked by Robotic Drone Medic Mod Schematic); loot from 2 kinds of container

Robotic Drone Stun Mod
the drone · removable
“Equip your drone with a Stun Gun capable of stopping zombies in their tracks.”
Range set to 2 Cooldown set to 10 at Q1 → set to 5 at Q6 Get it: craft at the Workbench from 5 Forged Steel + 10 Scrap Polymers + 4 Electrical Parts + 4 Mechanical Parts (unlocked by Robotic Drone Stun Mod Schematic); loot from 2 kinds of container
Dyes
Cosmetic: they change the colour of weapons, tools, vehicles and the drone.
Brown
Red
Orange
Yellow
Green
Blue
Purple
Black
Pink
Each dye: loot from 5 kinds of container, traders.
Read from the 7 Days to Die V3.3 game files (item_modifiers, items, recipes, loot, traders, Localization). PinDrop is fan-made and not affiliated with The Fun Pimps.