HK G3 Battle Rifle Expansion and R91 Project

⭐ ⭐ (847 endorsements) 📥 45,381 downloads 📌 v3.0 📅 5/15/2021
⚪ Last updated 2021

By DefenestratedKoala · Weapons

⬇ Download Mod Source: Nexus Mods ↗ 📅 Updated: 6/1/2021 📅 Created: 5/15/2021
⚠️ Install Order · 3 steps
1🛠️ F4SE — Fallout 4 Script Extender Download ↗
2🔧 UFO4P — Unofficial Fallout 4 Patch Download ↗
3📦 G3A3 mod by Subleader Find it →

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

🔍 Analysis

  • 👍 1.9% endorsement rate — high engagement, a strong quality signal
  • 🏆 #66 of 337 Weapons mods in this game by downloads

📋 About This Mod

I loved the HK G3 Battle Rifle mod uploaded by Subleader. But I felt it was missing a couple of options.

Additionally, with the old R91 rifle being removed from the Nexus, I felt there was a bit of a niche that needed to be filled.

Items added:

  • []Wood Handguard (made from the HK51's wood handguard)

    []R91 Handguard (Based on a CETME model)

    []Wood Hand Grip (Made from the PSG1 Handgrip)

    []PSG1 Handgrip

    []PSG1 Body (Made from the G3SG1 Body, with the front sight removed)

    []Wood stock with cheek rest (named R91 Marksman Stock in-game)

    []30 round magazine (Made from a CETME mag, has 4 variants that mirror the ones in the base G3 mod)

    []Glow sights (These only work for the gun body they were designed for. HK51 for the HK51, G3A3 for the G3A3, and G3SG1 for the G3SG1)

    Things to note:

    • []The 10 round magazine uses the drum magazine reload animation from the original mod, as I felt that one clipped the least.

      []For the replacer option, I had to remove the assault rifle from the supermutant level lists. This means that any other mods which alter that level list will be incompatible. I decided to replace the assault rifle with the laser guns instead.

      []Additionally, for the replacer option, the rifle still uses the 5. 56 ammo and the vanilla assault rifle stats. This is to allow the R91 to feel distinctive from the G3. Any R91 rifles spawned in will use only R91 parts, but can be modified by the player to use G3 parts. If you want to see enemies use the G3 parts, use the level list injector from the original mod.

      []The Combat Rifle Replacer will replace the Combat Rifle but will use the 45 ammo still, as I would like to avoid messing up LL spawning. Any Combat Rifles spawned in will use the R91 parts, but can be modified to have G3 parts by the player.

    • The replacer works best on a fresh save, but can work fine on an existing one (you may need to wait around 72 in game hours for lists to regenerate). Be aware that some assault rifles (which were already generated in-game) may not update their meshes properly. Any newly generated assault rifles should pull the correct meshes. The same will occur for the Combat Rifle replacer version as well.

      Any and all feedback regarding the spawn rates of the various attachments is very welcome! If the number of sights included for the replacer spawns seem too much, please let me know and I'll update the esp to reduce the possibilities.

      At the moment, I'm considering this mod complete (besides the obvious bug fixes).

      A huge shoutout to Subleader (and everyone else whose work was involved) for the G3 mod that inspired this!

🤖 AI-enhanced — based on mod data

This expansion adds an R91-inspired handguard and numerous customizations to the G3A3 mod by Subleader, plus optional files to replace the vanilla Fallout 4 Assault Rifle or Combat Rifle with the R91. It's a popular weapon mod with 847 endorsements and over 45k downloads, last updated in June 2021.

✨ Key Features

Adds an R91-inspired handguard to the G3A3 rifle mod
Includes many additional customization options for the G3A3
Optional file to replace the vanilla Assault Rifle with the R91
Optional file to replace the vanilla Combat Rifle with the R91

📊 Pros & Cons

✅ Pros

  • Community favorite with 847 endorsements and 45k downloads
  • Gives you two iconic Fallout 3 weapons in one mod
  • Customization options let you tailor the G3A3 to your playstyle

⚠️ Cons

  • Requires the original G3A3 mod by Subleader as a base
  • Last updated in 2021 – may have compatibility issues with newer game patches
  • Replacing vanilla weapons might conflict with other weapon mods
🎯 Is This For You?
For Fallout 4 players who love the classic R91 from Fallout 3 and want more variety in their weapon mods. Also for modders who enjoy detailed customization options. Skip if you prefer lore-friendly vanilla weapons or don't want to manage dependencies.
📦 Install:Medium· 5-10 minutes

💡 Beginner Tips

  • Make sure you have the original G3A3 mod installed first, as this expansion requires it.
  • If you use the optional replacement files, load them after other weapon mods to avoid conflicts.
  • Use a mod manager like Vortex or Mod Organizer 2 to keep track of the optional files and their load order.

📊 Mod Details

Game
Fallout 4 Mods
Author
DefenestratedKoala
Version
3.0
Downloads
45,381
Endorsements
847
Category
Weapons
Created
5/15/2021
Updated
6/1/2021

🧩 Commonly Used Together

Users add these mods to the same collections — a real compatibility signal, not an AI guess.

🔧 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.

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