Cleanup (Issue: Modification tables need standardising, resistances in different places from table to table)
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For the Legendary armor effects in Fallout 4, see Fallout 4 legendary armor effects. |
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In Fallout 4, armor can be modified using junk components. Anyone can create new base-level modifications, remove any existing modifications from armor and apply any player character-owned modifications to armor. The Armorer perk is required for creating new modifications of level 1 and above.
Raider armor mods[]
Raider chest armor mods[]
- Material
- Miscellaneous
Raider arm armor mods[]
- Material
- Miscellaneous
Raider leg armor mods[]
- Material
- Miscellaneous
Leather armor mods[]
Leather chest armor mods[]
- Material
- Miscellaneous
Leather arm armor mods[]
- Material
- Miscellaneous
Leather leg armor mods[]
- Material
- Miscellaneous
Metal armor mods[]
Metal helmet armor mods[]
- Material
Metal chest armor mods[]
- Material
- Miscellaneous
Metal arm armor mods[]
- Material
- Miscellaneous
Metal leg armor mods[]
- Material
- Miscellaneous
Combat armor mods[]
Combat helmet armor mods[]
- Material
Combat chest armor mods[]
- Material
- Miscellaneous
Combat arm armor mods[]
- Material
- Miscellaneous
Combat leg armor mods[]
- Material
- Miscellaneous
Synth armor mods[]
Synth helmet armor mods[]
- Material
Synth chest armor mods[]
- Material
- Miscellaneous
Synth arm armor mods[]
- Material
- Miscellaneous
Synth leg armor mods[]
- Material
- Miscellaneous
Robot armor mods[]
Robot helmet armor mods[]
- Material
Robot chest armor mods[]
- Material
- Miscellaneous
Robot arm armor mods[]
Material[]
Mod | DR | ER | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|
Standard | 8 | 3 | Standard. | 3 | – | – |
Painted metal | 9 | 4 | Improves Damage and Energy Resistance. | 3.7 | – | 00183FF3 |
Enameled metal | 11 | 5 | Improves Damage and Energy Resistance. | 4.8 | Armorer 1 | 00183FF4 |
Shadowed metal | 11 | 5 | Improves stealth in dark areas, Damage, and Energy Resistance. | 4.8 | Armorer 1 | 00183FF5 |
Alloyed metal | 12 | 6 | Improves Damage and Energy Resistance. | 5.6 | Armorer 1 | 00183FF6 |
Polished metal | 14 | 7 | Improves Damage and Energy Resistance. | 6.7 | Armorer 2 | 00183FF7 |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter Build | Reduces Weight. | +2 AP | -1.2 | – | 001940B3 | |
Pocketed | Improves carrying capacity. | +5 Carry Weight | +0.3 | – | 001940B2 | |
Braced | Reduce additional melee damage while blocking. | +0.7 | Armorer 1 | 001940B9 | ||
Brawling | Improves Unarmed damage. | +0.7 | Armorer 1 | 00245B91 | ||
Strengthened | Reduces limb damage. | +0.6 | Armorer 1 | 001940B7 | ||
Deep Pocketed | Improved carrying capacity. | +10 Carry Weight | +0.3 | Armorer 2 | 00245B5C | |
Lead Lined | +10 | Reduces radiation damage. | +1.5 | Armorer 2 Science! 1 |
001940B8 | |
Stabilized | Scoped Aiming is more steady. | +0.7 | Armorer 2 | 00245BB7 | ||
Aerodynamic | Power attacks drain less AP. | +0.3 | Armorer 3 | 00245BD1 | ||
Dense | Greatly reduced damage from explosions. | +1.5 | Armorer 3 | ???????? | ||
Ultra-Light Build | Greatly reduced weight and increased AP bonus. | +5 AP | -2.4 | Armorer 3 | 00245B32 | |
Weighted | Unarmed and Melee attacks ignore some of target's armor. | +1.2 | Armorer 4 | 00245BAA |
Robot leg armor mods[]
Material[]
Mod | DR | ER | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|
Standard | 8 | 3 | Standard. | 3 | – | – |
Painted metal | 9 | 6 | Improves Damage and Energy Resistance. | 3.7 | – | 00183FF9 |
Enameled metal | 11 | 7 | Improves Damage and Energy Resistance. | 4.8 | Armorer 1 | 00183FFA |
Shadowed metal | 11 | 7 | Improves stealth in dark areas, Damage, and Energy Resistance. | 4.8 | Armorer 1 | 00183FFB |
Alloyed metal | 12 | 8 | Improves Damage and Energy Resistance. | 5.6 | Armorer 1 | 00183FFC |
Polished metal | 14 | 9 | Improves Damage and Energy Resistance. | 6.7 | Armorer 2 | 00183FFD |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter Build | Reduces Weight. | +2 AP | -1.3 | – | 001940B3 | |
Pocketed | Improves carrying capacity. | +5 Carry Weight | +0.2 | – | 001940B2 | |
Cushioned | Reduces falling damage. | +0.2 | Armorer 1 | 001940BA | ||
Strengthened | Reduces limb damage. | +0.5 | Armorer 1 | 001940B7 | ||
Deep Pocketed | Improved carrying capacity. | +10 Carry Weight | +0.2 | Armorer 2 | 00245B5C | |
Lead Lined | +10 | Reduces radiation damage. | +1.5 | Armorer 2 Science! 1 |
001940B8 | |
Muffled | Reduces detection from moving. | Armorer 2 | 001940B4 | |||
Custom Fitted | Sprinting takes less AP. | +0.2 | Armorer 3 | 00245B7B | ||
Ultra-Light Build | Greatly reduced weight and increased AP bonus. | +5 AP | -2.5 | Armorer 3 | 00245B32 | |
Sleek | Increased Movement Speed while sneaking. | +0.2 | Armorer 4 | 00245BE1 |
Trapper armor mods[]
Trapper chest armor mods[]
Materials[]
Mod | DR | ER | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|
Standard | 16 | 16 | Standard. | 12 | – | xx?????? |
Welded | 18 | 18 | Improves Damage and Energy Resistance. | 13 | – | xx?????? |
Tempered | 20 | 20 | Improves Damage and Energy Resistance. | 14 | Armorer 2 | xx?????? |
Hardened | 22 | 21 | Improves Damage and Energy Resistance. | 15 | Armorer 2 | xx?????? |
Buttressed | 24 | 23 | Improves Damage and Energy Resistance. | 16 | Armorer 2 | xx?????? |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter build | – | Reduces weight. | +5 AP | -4.9 | – | xx?????? |
Padded | – | Reduced damage from explosions. | +6 | – | xx?????? | |
Pocketed | – | Improves carrying capacity. | +? carry weight | +1.1 | – | xx?????? |
Asbestos Lining | +15 | Reduced Energy Damage and immune to being set on fire. | +6 | Armorer 1 | xx?????? | |
Lead lined | +15 | Reduces radiation damage. | +6 | Armorer 2 Science! 1 |
xx?????? | |
Ultra-light build | – | Greatly reduced weight and increased AP bonus. | +10 AP | -9.7 | Armorer 3 | xx?????? |
BioCommMesh | – | Increases duration of chems 50%. | +3.6 | Armorer 4 Science! 2 |
xx?????? | |
Pneumatic | – | Reduces the magnitude of incoming staggers. | +3.6 | Armorer 4 | xx?????? |
Trapper arm armor mods[]
Materials[]
Mod | DR | ER | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|
Standard | 10 | 10 | Standard. | 7 | – | xx?????? |
Welded | 11 | 11 | Improves Damage and Energy Resistance. | 8 | – | xx?????? |
Tempered | 12 | 12 | Improves Damage and Energy Resistance. | 8 | Armorer 2 | xx?????? |
Hardened | 13 | 13 | Improves Damage and Energy Resistance. | 9 | Armorer 2 | xx?????? |
Buttressed | 14 | 14 | Improves Damage and Energy Resistance. | 10 | Armorer 2 | xx?????? |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter build | – | Reduces weight. | +2 AP | -2.9 | – | xx?????? |
Pocketed | – | Improves carrying capacity. | ? | +0.6 | – | xx?????? |
Brawling | – | Improved Unarmed damage. | +1.7 | Armorer 1 | xx?????? | |
Strengthened | – | Reduces limb damage. | +1.3 | Armorer 1 | xx?????? | |
Braced | – | Reduce additional melee damage while blocking. | +1.7 | Armorer 1 | xx?????? | |
Lead lined | +10 | Reduces radiation damage. | +3.5 | Armorer 2 Science! 1 |
xx?????? | |
Stabilized | – | Scoped aiming is more steady. | +1.7 | Armorer 2 | xx?????? | |
Aerodynamic | Power attacks drain less AP. | +0.6 | Armorer 3 | xx?????? | ||
Weighted | – | Unarmed and Melee attacks ignore some of target's armor. | +2.8 | Armorer 4 | xx?????? |
Trapper leg armor mods[]
Materials[]
Mod | DR | ER | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|
Standard | 9 | 9 | Standard. | 7 | – | – |
Welded | 10 | 10 | Improves Damage and Energy Resistance. | 8 | – | 001946E1 |
Tempered | 11 | 11 | Improves Damage and Energy Resistance. | 8 | – | 001946E2 |
Hardened | 12 | 12 | Improves Damage and Energy Resistance. | 9 | Armorer 1 | 001946E3 |
Buttressed | 13 | 13 | Improves Damage and Energy Resistance. | 10 | Armorer 1 | 001946E4 |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter Build | Reduces Weight. | +? AP | – | 0019588F | ||
Pocketed | Improves carrying capacity. | +? Carry Weight | – | 00195887 | ||
Cushioned | Reduces falling damage. | Armorer 1 | 00195893 | |||
Strengthened | Reduces limb damage. | Armorer 1 | 0019589A | |||
Deep Pocketed | Improved carrying capacity. | +? Carry Weight | Armorer 2 | 00245B5F | ||
Lead Lined | +10 | Reduces radiation damage. | Armorer 2 Science! 1 |
001958AF | ||
Muffled | Reduces detection from moving. | Armorer 2 | 00195898 | |||
Custom Fitted | Sprinting takes less AP. | Armorer 3 | 00245B7C | |||
Sleek | Increased Movement Speed while sneaking. | Armorer 4 | 00245BE2 |
Marine armor mods[]
Marine chest armor mods[]
Material[]
Mod | DR | ER | RR | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|---|
Zealot's | 38 | 38 | Standard. | 15 | – | xx009E5B | |
Assault | 50 | 49 | 10 | Improves Damage, Energy and Radiation Resistance. | 21 | Armorer 4 Science 4 |
xx056F80 |
Inquisitor's | 49 | 50 | 10 | Improves Damage, Energy and Radiation Resistance. | 21 | Armorer 4 Science 4 |
xx009E5B |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req: Rank | Form ID |
---|---|---|---|---|---|---|
Lighter Build | Reduces Weight. | +2 AP | -6 | – | xx?????? | |
Padded | Reduced damage from explosions. | +7.5 | – | xx?????? | ||
Pocketed | Improves carrying capacity. | +10 Carry Weight | +0.8 | – | xx?????? | |
Asbestos Lining | +15 | Reduced Energy Damage and Immune to being set on Fire. | +4 | Armorer 1 | xx?????? | |
Deep Pocketed | Improved carrying capacity. | +20 Carry Weight | +1.5 | Armorer 2 | xx?????? | |
Lead Lined | +15 | Reduces radiation damage. | +7.5 | Armorer 2 Science! 1 |
xx?????? | |
Dense | Greatly reduced damage from explosions. | +7.5 | Armorer 3 | xx?????? | ||
Ultra-Light Build | Greatly reduced weight and increased AP bonus. | +10 AP | -12 | Armorer 3 | xx?????? | |
Pneumatic | Reduces the magnitude of incoming staggers. | +4.5 | Armorer 4 | xx?????? | ||
BioCommMesh | Increases duration of chems 50%. | +4.5 | Armorer 4 Science! 2 |
xx?????? |
Marine arm armor mods[]
Material[]
Mod | DR | ER | RR | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|---|
Zealot's | 17 | 17 | Standard. | 10 | – | xx009E56 xx009E57 | |
Assault | 22 | 22 | 10 | Improves Damage, Energy and Radiation Resistance. | 14 | Armorer 4 Science 4 |
xx056F7B xx056F7C |
Inquisitor's | 22 | 22 | 10 | Improves Damage, Energy and Radiation Resistance. | 14 | Armorer 4 Science 4 |
xx009E56 xx009E57 |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter Build | Reduces Weight. | +2 AP | -4 | xx?????? | ||
Pocketed | Improves carrying capacity. | +5 Carry Weight | +1 | xx?????? | ||
Braced | Reduce additional melee damage while blocking. | +1.5 | Armorer 1 | xx?????? | ||
Brawling | Improves Unarmed damage. | +2.5 | Armorer 1 | xx?????? | ||
Strengthened | Reduces limb damage. | +2 | Armorer 1 | xx?????? | ||
Deep Pocketed | Improved carrying capacity. | +10 Carry Weight | +1 | Armorer 2 | xx?????? | |
Lead Lined | +10 | Reduces radiation damage. | +5 | Armorer 2 | xx?????? | |
Stabilized | Scoped Aiming is more steady. | +2.5 | Armorer 2 | xx?????? | ||
Aerodynamic | Power attacks drain less AP. | +1 | Armorer 3 | xx?????? | ||
Ultra-Light Build | Greatly reduced weight and increased AP bonus. | +5 AP | -8 | Armorer 3 | xx?????? | |
Weighted | Unarmed and Melee attacks ignore some of target's armor. | +4 | Armorer 4 | xx?????? |
Marine leg armor mods[]
Materials[]
Mod | DR | ER | RR | Description | Weight | Req Rank | Form ID |
---|---|---|---|---|---|---|---|
Zealot's | 18 | 18 | Standard. | 10 | – | xx009E59 xx009E5A | |
Assault | 23 | 23 | 10 | Improves Damage, Energy and Radiation Resistance. | 14 | Armorer 4 Science 4 |
xx056F7E xx056F7F |
Inquisitor's | 23 | 23 | 10 | Improves Damage, Energy and Radiation Resistance. | 14 | Armorer 4 Science 4 |
xx009E59 xx009E5A |
Miscellaneous[]
Mod | Damage Resist Mod
|
Description | Bonus | Weight Mod | Req Rank | Form ID |
---|---|---|---|---|---|---|
Lighter Build | Reduces Weight. | +2 AP | -4 | – | xx?????? | |
Pocketed | Improves carrying capacity. | +5 Carry Weight | +1 | – | xx?????? | |
Cushioned | Reduces falling damage. | +1 | Armorer 1 | xx?????? | ||
Strengthened | Reduces limb damage. | +2 | Armorer 1 | xx?????? | ||
Deep Pocketed | Improved carrying capacity. | +10 Carry Weight | +1 | Armorer 2 | xx?????? | |
Lead Lined | +10 | Reduces radiation damage. | +5 | Armorer 2 | xx?????? | |
Muffled | Reduces detection from moving. | Armorer 2 | xx?????? | |||
Custom Fitted | Sprinting takes less AP. | +1 | Armorer 3 | xx?????? | ||
Ultra-Light Build | Greatly reduced weight and increased AP bonus. | +5 AP | -8 | Armorer 3 | xx?????? | |
Sleek | Increased Movement Speed while sneaking. | +1 | Armorer 4 | xx?????? |
Power armor[]
One can add and remove mods from the power armor frame at a power armor station. Modding the armor can increase its Damage Resistance, change paint materials, improve core efficiency or add bonus stats and effects.
Helmet[]
- Removes radiation from consumed food and water.
- Requires Science! 2
- Increases Perception.
- Requires Science! 3
- Increases Intelligence.
- Requires Science! 2
- Sighted aiming marks enemies with a compass pip.
- Requires Science! 2
- Visor highlights living targets.
- Requires Science! 3
- Standard:
- Adds a standard headlamp.
- Blue:
- Adds a blue headlamp.
- Requires Science! 1
- Bright:
- Adds a bright - almost blinding - headlamp.
- Requires Science! 1
- Purple:
- Adds a purple headlamp.
- Requires Science! 1
- Red tactical:
- Adds a red tactical headlamp.
- Requires Science! 1
- Vault Boy:
Torso[]
- Increases Action Point refresh speed.
- Requires Science! 3
- Reduces chance for addiction from drugs.
- Requires Science! 1
- Below 20% health, speed increases 25% and incoming damage is reduced 50%.
- Requires Science! 4
- Taking damage recharges Action Points.
- Requires Science! 4
- Reflects 50% of melee damage back on attacker.
- Requires Armorer 4
- Activates stealth field while crouched.
- Requires Science! 4
- Deals Energy damage to nearby enemies.
- Requires Science! 3
Arms[]
- Unarmed attacks cause bleeding damage.
- Requires Blacksmith 2
- Increased Unarmed Damage.
- Requires Blacksmith 3
- Reduces Action Point cost for power attacks.
- Requires Blacksmith 1
- Adds Energy damage to Unarmed attacks.
- Requires Blacksmith 3, Science! 1
Legs[]
- Increases Carry Weight capacity.
- Requires Science! 2
- Reduces Action Point cost for sprinting.
- Requires Science! 3
- Increases sprint speed at additional Action Point cost.
- Requires Science! 3
- Increases Action Point refresh speed while moving.
- Requires Science! 2
- Increases damage radius for impact landing.
- Requires Science! 3
Shielding & paint[]
Note: Not all paint jobs are available on all parts.
Each part of the power armor can be painted or shielded separately. Paint jobs, however, only have an effect when the entire armor is painted in the same scheme, while shield coatings are effective per separate armor part and don't require a full set. As a general rule: paint, besides modifying the statistics of power armor, also adds a cosmetic effect to the power armor. While shield coatings, on the other hand, leave the appearance of an armor unchanged (winterized coating is a paint job in all respects despite the name and requires all pieces to possess the paint/coating to work).
Certain paint schemes and shields are limited to specific power armor models, while others are available for all power armors. Raider power armor cannot be painted or shielded at all. Painting does not require any materials with the exception of Vault-Tec paint and military paint.
Shielding/coating/plating[]
- +100 Radiation Resistance.
- Requires Armorer 1
- Requires: Adhesive 5, Aluminum 4, Circuitry 2, Fiber optics 4, Lead 4
- Increases action points refresh by 20% in the sunlight
- Requires Science! 3
- Requires: Adhesive 4, Aluminum 2, Crystal 4, Gold 2, Nuclear material 4
- +20 Energy Resistance.
- Requires: Adhesive 4, Aluminum 3, Rubber 6
- +40 Energy Resistance.
- Requires Science! 2
- Requires: Adhesive 4, Aluminum 2, Nuclear material 4, Rubber 4
- 2% less (for each piece) Damage from explosions.
- Requires Science! 1
- Requires: Adhesive 6, Aluminum 4, Ceramic 6
- +30 Energy Resistance.
- Requires: X-01 power armor, Adhesive 6, Aluminum 8, Rubber 8
- +20 Energy Resistance.
- Requires: X-01 power armor, Adhesive 8, Aluminum 8, Crystal 6
Paint schemes[]
For paints that require all pieces to be painted to grant a SPECIAL bonus, as long as all parts have the same stat boosted, they can be mixed without limit.
- Decreases action point cost for sprinting and increases Charisma with all pieces painted
- Requires: T-60 power armor
- Can be bought from Rowdy at the Atom Cats garage
BOS knight paint (described in-game as "BOS II")
- Increases Strength with all pieces painted.
- Requires: T-60 power armor
- Complete mission Shadow of Steel
BOS paladin paint (described in-game as "BOS V")
- Increases Strength with all pieces painted.
- Requires: T-60 power armor
- Complete mission Blind Betrayal
BOS sentinel paint (described in-game as "BOS VI")
- Increases Strength with all pieces painted.
- Requires: T-60 power armor
- Complete mission A New Dawn
- Increases Strength with all pieces painted.
- Requires: T-60 power armor
- Only available by looting the T-60 power armor worn by Arthur Maxson during Airship Down.
- The paint job can be removed but never reapplied.
- Increases Charisma with all pieces painted.
- Requires: T-45 power armor
- Completing The First Step quest will unlock this paint.
- Increases Intelligence with all pieces painted.
- Requires: X-01 power armor
- Finishing the game with the Institute will unlock this paint.
- Increases Perception with all six pieces painted.
- Requires: T-51 power armor
- Complete Tradecraft to unlock
- Increases Agility with all pieces painted.
- Requires: None
- Obtaining the Hot Rodder Magazine will unlock this paint
- Increases Agility with all pieces painted.
- Requires: None
- Obtaining the Hot Rodder Magazine will unlock this paint
- Increases Agility with all pieces painted.
- Requires: None
- Obtaining the Hot Rodder Magazine will unlock this paint
- Increases Strength with all pieces painted.
- Requires: Adhesive 4, Aluminum 6, Nuclear material 2
- Increases Strength with all pieces painted.
- Requires: T-51 power armor
- Can be obtained from a terminal in Vim! Pop factory.
- Increases Agility with all pieces painted.
- Requires: T-51 power armor
- Can be obtained from a terminal in Vim! Pop factory.
- Increases Strength with all pieces painted.
- Requires: T-51 power armor
- Available if Contraptions Workshop is installed.
- Increases Agility with all pieces painted.
- Requires: T-51 power armor
- Available if Contraptions Workshop is installed.
- Increases Agility by 3 with all pieces equipped.
- Requires: None
- Only accessible to the Nuka T-51 power armor
- The paint job can not be removed or applied.
- Increases Action Point refresh speed with all pieces equipped.
- Requires: None
- Only accessible to the Quantum X-01 power armor
- The paint job can not be removed or applied.
Armored clothing[]
Many articles of clothing can have Damage and Energy Resistance added at an armor workbench. See ballistic weave for details.
Notes[]
- Each time a new mod is built, the Sole Survivor receives a small number of XP.
- Armor mods in the "Mods" tab in the Pip-Boy represent those mods that have been removed from armor one has modded. They are available for use on other armor pieces of the same type without crafting them again. These unused mods can be stored in a workbench, and will be available at the armor workbench.
- The player character needs to acquire and increase the Armorer perk to mod more advanced armor pieces (i.e. "Sturdy" or "Heavy"). However, they can apply mods made for lesser armor pieces to more advanced pieces of the same material type. For example, one can make a studded leather mod for a standard leather chest piece and then move it to a sturdy or heavy leather chest piece. This allows the player character to bypass the inability to make mods for those advanced pieces directly.
- The shadowed mod for leather armor, metal armor and combat armor will significantly darken the color of such items. Similarly, the polymer and fiberglass armor mods will brighten the color of such items.
- The Dense mod adds the hidden perk "mod_armor_Explosions2Perk" with the effect "Mod Incoming Explosion Damage, Multiply Value, 0.50" (-50% damage from explosions). The Padded mod adds the hidden perk "mod_armor_Explosions1Perk" with the effect of "Mod Incoming Explosion Damage, Multiply Value, 0.75" (-25% damage from explosions). Having more than one modded armor piece with the same hidden perk will not provide additional benefit. However, having one piece with Padded and another with Dense gives a total of -62.5% damage from explosions ((0.5*0.75)-1).
- The dense mod for metal arm armor and metal leg armor does not have a loose mod that can be viewed in the "Mods" tab of the Pip-Boy. It is missing the correct loose mod object in the games background files, so each time it is removed, the game just removes the effects from the item. That being said, it still does provide protection from explosions when the mod is attached.