Armor Penetration Bug Fix - F4SE

⭐ ⭐⭐ (4,271 endorsements) 📥 505,764 downloads 📌 v1.0.2 📅 8/13/2023
🟡 Updated this year

By Zzyxzz · Bug Fixes

⬇ Download Mod Source: Nexus Mods 📅 Updated: 7/6/2026 📅 Created: 8/13/2023
⚠️ Potentially Incompatible — Recent Game Update

This mod may not work until the author updates it. Check for an update, or see the rollback guide.

⚠️ Install Order · 3 steps
1🛠️ F4SE — Fallout 4 Script Extender Download ↗
2🔧 UFO4P — Unofficial Fallout 4 Patch Download ↗
3📦 F4SE Find it →

Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.

🔍 Analysis

  • 👍 0.8% endorsement rate
  • 🏆 #34 of 103 Bug Fixes mods in this game by downloads

📋 About This Mod

If you are looking for direct helpinformationpatchesunreleased mods, pre-released updates for my mods or just want to talk and share images and videos of your adventures, feel free to join us!

Consider Supporting me for more awesome mods!

What does this mod do?

This mod addresses a bug with the Armor Penetration System. It prevents incorrect stat overwriting when unequipping or changing weapons, ensuring accurate and consistent gameplay experience.

This fix now also works for all NPCs.

This mod does not contain a ESP or ESL file. It's only a .dll file.

Wait, there is already a mod that does that!

Yes and no. Unfortunately I discovered, that the fix is working too good. When changing weapons with hotkeys, it will reset the armor penetration amount to 0, even when the equipped weapon has armor penetration. It practically disabled Armor Penetration, when using hotkeys. The other armor penetration bug fix mod is now hidden, with a link to this mod(currently not working as Nexusmods doesnt let me mark that mod as obsolete.). This F4SE solution works without this bug and is faster than the scripted version.

Can I update from the old mod?

Yes! I verified that.

You have suggestions or questions? Feel free to post them into the comment section!

Check out my other mods:

Cooking Overhaul

Cooking Overhaul allows you to disable the heal , buff or radiation effects

from food. There is also an separate version, which is a complete

overhaul of many existing food items. Weight and caps value have been

re-balanced. And new recipes!

Better Power Armor - Redux

Your Power Armor will now fully absorb the damage of ballistic and laser weapon types.

Each armor part will work individually and absorb the damage of the body part it covers.

When one power armor part breaks, only this body part that was covered will take damage.

Keep your power armor in a good state and it will protect you.

Dynamic Helmet

Auto equip/unequip helmet when combat starts/end. Quick toggle of the

🤖 AI-enhanced — based on mod data

This F4SE bug fix prevents incorrect stat overwriting in Fallout 4's Armor Penetration System when unequipping or changing weapons, ensuring accurate and consistent gameplay. With 4,271 endorsements and 505,764 downloads, it's a popular, lightweight fix for players experiencing armor penetration stat issues.

✨ Key Features

Fixes a bug where armor penetration stats are incorrectly overwritten when unequipping or changing weapons
Ensures accurate and consistent gameplay experience
Requires F4SE (Fallout 4 Script Extender)

📊 Pros & Cons

✅ Pros

  • Huge community trust: 4,271 endorsements and over half a million downloads
  • Directly fixes a frustrating stat bug that affects combat balance
  • Lightweight and focused—does exactly what it says without bloat

⚠️ Cons

  • Requires F4SE, so you'll need to install that first if you haven't
  • Only addresses armor penetration stat overwriting—no other bug fixes included
  • Last updated July 2026, so it's current, but if the game updates, F4SE might break it temporarily
🎯 Is This For You?
For Fallout 4 players who've noticed armor penetration stats not sticking when swapping weapons or gear. If you're a power armor or high-DPS build that relies on penetration, this is a must-have. Skip if you never use armor penetration perks or mods—this won't affect your game.
📦 Install:Medium· 5-10 minutes

💡 Beginner Tips

  • Install F4SE first—this mod won't work without it, and make sure you launch the game through f4se_loader.exe
  • If you're using a mod manager like Vortex or MO2, let it handle the F4SE installation to avoid conflicts
  • After installing, test by equipping and unequipping a weapon with armor penetration to confirm the fix is active

📊 Mod Details

Game
Fallout 4 Mods
Author
Zzyxzz
Version
1.0.2
Downloads
505,764
Endorsements
4,271
Category
Bug Fixes
Created
8/13/2023
Updated
7/6/2026

🔧 How to Install Fallout 4 Mods

Download from Nexus.

📖 Full step-by-step install guide for Fallout 4 →

Visit the official mod page for specific installation instructions for this mod.

🎮 Need cheat codes or console commands? Check ur gaming wiki for Fallout 4 commands, item IDs, and more.

Keep browsing — more Fallout 4 mods await

📋 All Fallout 4 Mods 🏆 Top 25 📂 More Bug Fixes 👤 More by Zzyxzz 🔎 Similar Mods 🌐 Best Bug Fixes (All Games) ⚠️ Fix Crashes & Errors 💾 Save Files 🔀 Check Compatibility ⚖️ Compare Mods 🆕 New Mods