LR300 Arpeggiator with functional underbarrel launcher
⚪ Last updated 2010⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 3.6% endorsement rate — high engagement, a strong quality signal
- 🏆 #170 of 313 Weapons mods in this game by downloads
📋 About This Mod
Intro =========== This mod add to the game a single LR300 rifle \"Arpeggiator\" w/ functional underbarrel grenade launcher. Choose between 2 firing modes for the rifle or switch to the functional launcher with up to 5 different types of grenades available ! This weapon was inspired by the model of the W-M LR300 by Xzax in his LR300ModAssaultRifle\" mod (http://www.fallout3nexus.com/downloads/file.php?id=6261), and completed by accessories from Jackpack in his \"Weapon upgrade kit and tutorial\" mod (http://www.fallout3nexus.com/downloads/file.php?id=8770). All credits go to them for the original models and textures. The new selection script was inspired by the great work of NosRhyfelwr for the \"20th Century Weapons Selector Scripts\" (http://www.fallout3nexus.com/downloads/file.php?id=10448). Many thanks for his support. Support him and click here: http://www.fallout3nexus.com/modules/members/kudos.php?id=956857 ! Update ======== Version 1. 02 is up. This update adds a new \"radioactive\" grenade a.k.a killing cloud. Beware! radiation is everywhere but you have become master of it and captured the essence of Atom itself in a new delicate capsule. You can now bask your enemies with a deadly radioactive cloud which will slowly kill them, and provoke the envy of the ghoul reaver and other glowing ones! I wanted to circumvent the fact that Bethesda have made all NPC resilient to radiation poisoning, and also wanted to introduce a notion of chemical warfare to the Fallout universe (well at least there are few usable chemical weapon in there). The grenade in itself will deal NO damage on explosion, everything is in the \"object effect\" of the explosion, it will affect anyone within the radius even if half hidden behind a wall for example to reinforce the effect of a cloud dispersing not an explosion blast stopped by some shield. Once hit by the effect your targets will glow and slowly their life will be taken away (by poisoning as radiation overdose is unavailable for NPC). If they are not chasing you they will eventually go back to their routine and suddently drop dead as the contamination is tagged \"painless\" and last a few (around 60 sec and will take almost 200 HP). This can allow for new tactics to clear out especially whole packs of targets silently and more easily with very few ammo, the vision can be surprising when you come to check your \"drop point\" after few seconds. This grenade will have NO EFFECT at all on: robots, super mutants and ghouls, will work also on mutated creatures (they will glow too and die, but i have not extensively tested). 2 free rounds can be found in the original weapon container, vendor lists have also been updated. This item is the most expensive of all, double the price of explosive & incendiary, despite the fact that its prime materials may be abundant its delayed lethal effect have to be balanced. +++ Misc. tweaks: - highly reduced the damage of the pulse grena
Adds a single LR300 rifle with a functional underbarrel grenade launcher to the game. Features two firing modes for the rifle and a launcher with five grenade types. A compact weapon mod with 349 endorsements, last updated in 2010.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Functional underbarrel launcher is a rare treat—adds real tactical flexibility
- Community-backed with 349 endorsements and nearly 10k downloads
- Two firing modes give you options without cluttering your inventory
⚠️ Cons
- Last updated in 2010—likely outdated for current game versions
- Only one weapon, so it's a niche addition for variety seekers
For players who want a unique rifle with a built-in grenade launcher for extra firepower. If you're on an older game version and enjoy experimenting with custom weapons, this is worth a shot. Skip if you need modern compatibility or a full weapon pack.
💡 Beginner Tips
- Check if your game version matches the mod's 2010 update—older mods often need compatibility patches
- Test the grenade launcher in a safe area first to learn its arc and damage
- If using a mod manager, preview the weapon in-game to see if it fits your loadout
📊 Mod Details
- Game
- Fallout 3 Mods
- Author
- thorbits
- Version
- 1.02
- Downloads
- 9,686
- Endorsements
- 349
- Category
- Weapons
- Created
- 1/1/2010
- Updated
- 1/4/2010
🔧 How to Install Fallout 3 Mods
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