Weapon and Armor Mods (5e Fallout Supplement)

Certain weapons and items have modifications that greatly increase their abilities or completely change their mechanics all around. Below is a list of mods, how much they cost, and what weapons they apply to. Someone with the proper tools and know how (minimum Intelligence score of 12) can craft mods for half the cap cost and 10 minutes time. It's perfectly fair for the dungeon master to require the party to obtain a special material before crafting some modifications (ex, diamonds for the diamond tip chain or finding barbed wire for the barbed barrel) - after all, it's a post-apocalyptic setting and some materials may be much scarcer than they would normally be.

Most modifications, though, can be made with some random scrap, elbow grease, and good ol' gumption.

Melee Weapon Mods

Name	Type	Cost	Effect
Melee Weapon Mods
Serrated Blade	Bladed Weapons	1500	If the attack roll succeeds by at least 3 against a creature that is not a construct or wearing power armor, the target takes half the attack's damage at the end of each of their turns until they regain at least 1 hit point.
Poisoned Edge	Bladed Weapons	2500	On hit enemies are poisoned for 1 minute
Heavy Weight	Blunt Weapons	1500	On hit enemies are knocked back by 10ft and take an extra d4 damage
Sandman's Frame	Blunt Weapons	2500	On critical hit knocks enemies unconscious for 1 minute
Light Weight Materials	Heavy Weapons	500	Removes the heavy property
Lighter Weight Materials	Non-Heavy Weapons	200	Gains the light property
Aerodynamic Coating	All	400	Counts as a thrown weapon (range 20/60)
Reinforced	All	1050	Increases Damage die by 1
Realignment	All	1000	Gain +1 to damage rolls
Novice's Realignment	All	2000	Gain +2 to damage rolls (Requires & replaces normal realignment)
Adept's Realignment	All	3000	Gain +3 to damage rolls (Requires & replaces Novice's realignment)
Master's Realignment	All	4000	Gain +4 to damage rolls (Requires & replaces Adept's realignment)
Weighted Grip	All	100	Gives a +1 bonus to attack rolls with the weapon
Novice's Grip	All	100	Gives a +2 bonus to attack rolls with the weapon (Requires & replaces Weighted Grip)
Adept's Grip	All	200	Gives a +3 bonus to attack rolls with the weapon (Requires & replaces Novice grip)
Master's Grip	All	300	Gives a +4 bonus to attack rolls with the weapon (Requires & replaces Adept's grip)
Electric Charge	All	200	Changes the damage type from melee to energy
Mahogany Wood	Baseball Bat	145	The weapon's weight is halved
Steel Core	Baseball Bat	230	The weapon deals additional damage equal to the attack's ability modifier.
Box O' Nails	Baseball Bat	100	Gain the serrated blade mod
Light Frame	Chainsaw	180	Removes the heavy property
Diamond Tip Chain	Chainsaw	250	Ignores increases attack bonus by 5 (not compatible with the Electric Charge mod)
Hardened Coating	Batons/Clubs	200	Gives a +1 bonus to all AC while wielding this weapon
Spike Knuckles	Brass Knuckles	150	Gives +1 bonus to damage rolls with the weapon
Extended Barrel	Ballistic Fist	250	gains a range of 10ft
Thousand Fold Steel	Katana/Shishkebab/Chinese Officer Sword	500	Increases the damage die by 1
Rapid Hammer	Power Fist	330	You can make a second attack as a free action
Bladed Sheath	Shishkebab/Chinese Officer Sword	450	The weapon's reach increases by +5 ft.
Stealth Gauntlet Frame	Gauntlet/Glove	260	Gains the holdout property
Ballistic Grip	Combat Knife	420	The weapon also counts as a Pipe 10mm Rifle
Pulse Tip	Shock/Stun Baton	200	Gains the pulse property
Plasma Flame	Shishkebab	1000	The weapon's damage is no longer halved against constructs and creatures wearing power armor
Heated Mallet	Super Sledge	2000	Gains the burning property

Ranged Weapon Mods

Name	Type	Cost	Effect
General Modifications
Long Barrel	All	300	Gain +30 ft. range
Telescopic Sight	All	410	The weapon's ranges are doubled while benefiting from the scoped property
Biometric sight	All	350	As a bonus action while benefiting from the scoped property, you learn the AC and current hit points of one creature within range
Holographic sight	All	200	The weapon gains a +2 bonus to attack rolls while benefiting from the scoped property
Scope Rail System	All	600	You can have multiple sights on the same weapon
Light Weight Structure	Heavy guns	750	Removes the heavy property
Steady Stock	All	300	Gain +1 to attack rolls
Bayonet Lug	Rifles	200	Weapon also counts as a knife (upgraded separately)
Paint Job	All	50	Gain +1 to charisma checks
Single Action	Guns with the Burst property	240	Burst property reduced by 3
Melee Mount	Rifles	2000	Weapon also counts as a melee weapon with the light property (upgraded separately)
Ballistic Ranged
Powerful Calibrated Receiver	All	1080	Gains a +2 bonus to damage rolls
Calibrated Receiver	All	540	Gains +1 bonus to damage rolls
Light Weight Frame	All	340	Halves the weapon's weight
Light Weight Stock	Rifles/Shotguns	260	Halves the weapon's weight (can stack with the Light Weight Frame mod)
Shredder Casing	Rifles/Shotguns	4000	On a hit, decreases the target's AC by -1. This can not decrease a target's AC below their unarmored AC.
Dragons Breath Load	Shotguns	560	Gains the burning property
Magnum Slugs	Shotguns	550	The weapon's ranges are doubled
Breach Load Chamber	Shotguns	650	Attacks with the weapon target creatures within a 10 ft. cone in the direction of the target, dealing half as much damage to creatures that are not the target
Venelator Cartridges	Submachine Guns	550	Burst property reduced by 3
Engravings	All	840	+3 to charisma checks
Hi-Point Rounds	All	600	Attacks with the weapon ignore half cover and three-quarters cover becomes Half Cover
Hollow Point Rounds	All	650	Deal double damage against non-constructs while you deal half damage against constructs and power armored creatures
Dum-Dum Rounds	All	650	Deals -1 damage but weapon does not degrade on a 1 nor can it jam
Pulse Rounds	All	650	Deals double damage against constructs and power armored creatures but deals half damage against anything else
Fire Selector	All	800	As a bonus action you can switch what ammo type you are using, any mod with Rounds in the name counts as an ammo type mod.
Silencer	All	550	The weapon gains the silenced property
Explosive Chambering	All	450	The weapon's damage type becomes explosive and gains the blast (10 ft.) property
Expanded Chamber	Revolvers	220	The weapon's magazine increases by 4
Double-Action	Revolvers	620	Gains the automatic property
Extended Mag	Rifles/Shotguns/SMGs/Pistols/Heavy Weapons	220	Doubles the weapon's magazine
Quick Draw Mags	All	140	Reloading becomes a free action
Barbed Barrel	Minigun	650	Also counts as a chainsaw (upgraded separately)
Drum Mag	Tommy Gun	150	Doubles the weapon's magazine
Oak Foregrip	Tommy Gun	300	+2 to attack rolls
Mahoghany Grip and Stock	Tommy Gun	450	+2 to attack rolls
Drilling Variant	Double Shotgun (SxS)	540	The weapon doubles as a hunting rifle with a magazine of 1
Underslung Grenade Launcher	Chinese Assault Rifle (Type 93)/Caseless Assault Rifle (H&K G11)	1000	Weapon also counts as a Grenade Rifle (M79) (upgraded separately)
Grenade Barrel	Battle Rifle (M1 Garand)	950	You may load one grenade in the weapon as a bonus action. You may throw this grenade as a bonus action up to its long range without disadvantage
Combat Bayonet	Assault Rifle (M16A1)/Service Rifle	250	Weapon counts as a combat knife with the reach property (upgraded separately)
Triangular Bayonet	Battle Rifle (M1 Garand)/Black Powder Rifle	300	weapon counts as a knife with the serrated blade mod (upgraded separately)
Heat Treated Body	Cowboy Repeater/Lever-Action Rifle	700	+2 to attack rolls and the weapon's base damage die becomes 3d6
Big Iron Conversion	Hunting Revolver/Ranger Sequoia	1200	Gains a +5 bonus to attack and damage rolls with a +2 to initiative
Energy Ranged
Beam Focuser	All	700	Removes the bolt property and gains the automatic property
Heatsink Dispenser	All	420	Gains burning
High Fission Capacitor	All	620	Gains a +1 bonus to damage rolls
Gyroscopic Calibration	All	1200	Gains a +2 bonus to attack rolls
Ghost Wave Emitter	All	440	Gains the silenced property
High Energy Capacitor	All	1000	Gains an extra damage die
Optimized Tuning	All	500	Doubles the weapon's magazine
MicroFusion Breeder Conversion	Rifles/Pistols/SMGs/Shotguns	2400	The weapon's magazine is halved and uses a MicroFusion Breeder
Calcite Refractor	Laser Rifle	1200	your shots are invisible to the naked eye, gains the silenced property and when you hit an enemy you don't alert them.
Quantum State Rounds	Plasma Rifle	420	on a miss the round returns to the chamber as if it were never spent
Accelerated Coils	Plasma Rifle	260	When you make an attack action you can make a second attack as a free action
Jacobs Ladder	Telsa Rifle	500	Attacks chains to additional targets within 15ft of original target or affected targets
System Shock	Tesla Rifle	1000	On hit targets must make a DC 16 Con save or become stunned until their next turn
Disintegration Ray	Alien Blaster/Atomizer	2000	Ignores cover and as a bonus action can destroy up to 10ft of material
Explosive Ranged
Thumper Rounds	Grenade Launcher	3000	On a hit, the target is knocked prone
Extra Chamber	All	1000	Increase magazine by 1

Armor Mods

Armor similarly can also be modded. this table will tell in the same way what parts, cost, and effect the mod has. Someone with the proper tools and know how (minimum Intelligence score of 14) can craft mods for half the cap cost and 10 minutes time.

Name	Part	Cost	Effect
Armor Mods
Lead Lining	All	500	-1d12 to radiation you gain
Light Weight Stuffing	All	100	Halves the weight of armor
Faction Emblem	All	50	+2 bonus to Charisma checks with a specific faction
Nanotube Weave	All	1000	+1 bonus to AC
Terrifying Paint Job	All	225	+3 bonus to Intimidation
Elder Sign	All	5000	+1 bonus to AC, aberrations and monstrosities gain -1 to all rolls against you while you get +1 to all rolls dealing with aberrations and mostrsities
Custom Fitted	All	75	+1 to initiative .
Internal Compass	Helmet	75	+2 bonus to Survival checks involving navigation, and you know which direction is north
Internal Radio	Helmet	130	Able to receive and communicate with radios within 10 miles of you
Rebreather	Helmet	325	gain water breathing
Flashlight	Helmet	50	Provides bright light for first 20ft than low light for the next 20ft.
Motion Sensor	Helmet	300	+2 on Perception checks involving creature detection within 30ft.
Tin Plating	Helmet	200	Gives advantage on checks against certain non-physical psychic or mind-altering influences (i.e. mind control and Mirelurk King's Shout).
Spiked Shoulders	Arms	400	When a creature makes a melee attack against you, they take 1d4 melee damage when attacking you
Silk Gloves	Arms	60	+2 bonus to Sleight of Hand and Performance checks
Holdout Holster	Arms	75	+3 bonus to hiding one pistol or SMG within the holster
Quickdraw Holster	Arms	75	One pistol or SMG within the holster can be pulled out as a free action
Rubber Padding	Arms	125	Reduce all energy damage taken by 1
Stabilizers	Arms	100	+1 to hit
Asbestos Lining	Chest	2000	You count as a construct for the sake of the burning property
Auto Injector	Chest	5000	You automatically use 1 stimpack when you fall below half your maximum hit points without using any form of action
Emergency Injector	Chest	5000	You automatically use 1 stimpack when you fall to 0 hit points without using any form of action
Extra Pockets	Chest	135	The armor can store 1 cubic foot/30 pounds of gear
High Traction Soles	Legs	150	+10 ft. bonus to movement speed
Noise Canceling Aglets	Legs	1650	You make no noise while moving and +4 to stealth
Denim Lining	Legs	175	Ignore difficult terrain
Knife Sheath	Legs	50	+3 to hiding one throwing knife or similar small blade in your boot.

Name	Series	Cost	Effect
Power Armor Mods
Jetpack	All	3000	You gain a 60 ft. fly speed as a bonus action until the end of your turn
Paint Job	All	1000	+3 to Intimidation
Speed Demon Treads	All	2000	+20 ft. bonus to your movement speed
Stomp Forces 1's	All	5500	When you fall at least 10 ft., you count as dropping a fragmentation grenade in the place you landed. This does not require you to have a fragmentation grenade, and you are not targeted, you don't take fall damage.
Oxygen Tank	All	2400	Suit is fully sealed and holds 12 hours of oxygen
Mynomar Muscle Fibers	All	8000	Removes the heavy property from the armor
Extra Plating	All	5000	Gain +1 AC
Shoulder Mounted Weapons	All	5000	You can mount a big gun onto the shoulder of a suit of power armor
Runic Connections	All	2000	Alien weapons deal half damage against you
Psychic Dampeners	All	1500	While inside the armor you are immune to psychic or mind-altering influences (i.e. antiviolence field, mind control, hallucinations)
TES Overhaul	T-51	1000	When wielding melee weapons gain a +3 to attack and damage rolls
Overboss's Touches	T-51	6000	gain +3 to AC and as a reaction you can negate any attack targeting you
Lion's Roar	T-60	4000	As an action you can blast a loud roar that all within 160ft can hear, enemies who hear it must pass a Wis save DC 8+str+prof bonus or become frightened
Thomas The Blood Tank	T-60	1800	As an action choose a direction, you triple your move speed and move in a straight line up to that distance ignoring difficult terrain and moving through enemies. Large or smaller enemies caught in the line take Melee damage equal to prof mod + level d8 + str mod.
B.O.S. Cog of Steel	T-60	10000	+4 bonus to your Strength score while being worn (this can push you above the maximum cap)
Space Retrofit	X Series	20000	+1 bonus to AC and immunity to the effects of a vacuum, you ignore difficult terrain and gain a swimming speed equal to your move speed in zero-g environments or underwater
Quantum Coating	X Series	12000	you can use half your ac + prof mod + save instead of rolling for saving throws
Tesla Upgrade	X Series	10000	Reduce all damage taken by half your AC

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