Rapid Fissile Accelerator

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Data is potentially outdated
Last updated for version
Last mentioned in changelog
The current game version is
Rapid Fissile Accelerator

A prototype energy weapon built using the unique alien materials on Europa. The weapon induces a type of fission reaction at the end of the barrel, and releases it in a powerful beam once it is too violent to contain.
 Stun (0.5)*
Explosion (1.25m):
 Burn (25)*
 Stun (1)*
Quality Bonuses +10% Affliction Strength
Attack Speed 0.8
Explosion Radius 1.25 m
Severance chance 50%
Structure damage 35
Ballast Flora Damage
50 (Explosion)
Item Damage 35
Fuel Rod Supply Fuel Rod (4 Shots)
Thorium Fuel Rod (8 Shots)
Fulgurium Fuel Rod (12 Shots)
Volatile Fulgurium Fuel Rod (20 Shots)
Fuel Rod Supply Capacity 1
Skill Requirements
Skill Requirements
Weapons: 25
Handicap Spread +10 (0 → 10)
Talent: Nuclear Option
Skill: Electrical: 65
Deconstructor Yield
Reputation Requirement
Base Price 900 mk
OutpostOutpost Buy Sell
Habitation OutpostHabitation N/A 405 mk
ColonyColony N/A 337 mk
Research OutpostResearch N/A 337 mk
Military OutpostMilitary 810 mk 243 mk
Mining OutpostMining N/A 337 mk
Medical MerchantMedical Merchant N/A 270 mk
Engineer MerchantEngineer Merchant N/A 270 mk
Armory MerchantArmory Merchant N/A 270 mk
Children of The HonkmotherClown Merchant N/A 270 mk
The Church of HuskHusk Merchant N/A 270 mk
Identifier nucleargun
Categories Weapon
Tags mediumitem, weapon, gun, mountableweapon

The Rapid Fissile Accelerator is a Handheld Ranged Weapon in Barotrauma.


The Rapid Fissile Accelerator is a two-handed long-range large-size weapon. When the trigger is held, the weapon will charge up and then fire a beam after a delay of 0.75 seconds, using various Fuel Rods as ammunition. The Rapid Fissile Accelerator is incredibly precise and powerful, capable of reasonably dealing with anything the size of a Mudraptor Veteran or smaller with ease at far ranges.

It can be crafted by an Engineer with the Nuclear Option unlocked, or it can be bought from Coalition Military Outposts if the player has at least 70 Reputation with the Europa Coalition.


The Rapid Fissile Accelerator is held with both hands and must be loaded with a Fuel Rod, Thorium Fuel Rod, Fulgurium Fuel Rod, or Volatile Fulgurium Fuel Rod to be used. As with all weapons and tools, using it is done by holding the Right Mouse Right-click to take aim, then by Left Mouse Left-clicking to shoot/use.

  • It has a single slot for ammunition that can contain a single Fuel Rod.
  • Due to the Rapid Fissile Accelerator's size, it cannot be carried in the hotbar. It can only be held with both hands, or in the Gear slot, which hangs it from the Character's back.
  • Like most two-handed weapons, the Rapid Fissile Accelerator has a Flashlight slot. The inserted Flashlight automatically turns on whenever the weapon is drawn.
  • When using the Rapid Fissile Accelerator it is advised to wear PUCS if available, as the explosion can hurt the user and deliver heavy doses of Radiation Sickness.

Damage Values

Structure Damage
Explosion Range (m)
Explosion Afflictions
Rate of Fire
Projectile Speed
Rapid Fissile Accelerator
Deep Tissue Injury (50)*
Radiation Sickness (25)*
Stun (0.5s)*
Impact: 35

Explosion: 0

Burn (25)*
Radiation Sickness (80)*
Stun (1s)*
Fuel Rod Type Rapid Fissile Accelerator shots
Normal Good Excellent Masterwork
Fuel Rod 4 5 5 6
Thorium Fuel Rod 8 9 10 11
Fulgurium Fuel Rod 12 14 15 16
Volatile Fulgurium Fuel Rod 20 22 24 26

Related Talents

Talent Tree Description

Nuclear Option
ID: nuclearoption
Weapons Engineer
Spec. 4
You can craft much cheaper Nuclear Shells and Nuclear Depth Charges, using non-spent Fuel Rods.

Unlock recipe: Rapid Fissile Accelerator.


Submarine Weapons
Large Turrets
Handheld Weapons
Ranged Weapons
Melee Weapons
Ammunition & Explosives