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The Vault - Fallout Wiki
The Vault - Fallout Wiki
Icon disambig.svg
For an overview of plasma rifle models throughout the Fallout series, see Plasma rifle.
Q-35 matter modulator
Plasma rifle icon.png
SkillEnergy Weapons 25
Strength Req.2
Attack statistics
40 (47.6)
96 (159.9)
DPS (reload)
60 (98.1)
Crit Dmg
Crit % Mult
2.4 (3.4)AP28
Ammo & reloading
Ammo TypeMicrofusion cell
Ammo Cap.12
Reload Time
3 (2.3)
Item HP250
Plasma rifle
Energy rifles (other)
Editor ID?
Base ID000e6064
Perk Effects
Perks (dam.)
Lord Death
Perks (Att.)
Fast Shot
Perks (Rel.)
Rapid Reload

The quantum plasma modulation matter injection rifle, version 35[1] (or simply Q-35 matter modulator) is a prototype and unique version of the plasma rifle in Fallout: New Vegas.


The following section is transcluded from Plasma rifle. To modify, please edit the source page.

Plasma rifles or plasma casters are high tech weapons firing superheated bolts of plasma, powered by either microfusion cells or heavy energy cells, which find numerous applications in military and industrial fields. The bolts form into toroids in the plasma chamber, which are then sent down a superconducting barrel,[2][3][4] propelled by, and in some models stabilized by electromagnetic claws upon exiting it.[5] However, the plasma bolt chamber can be hotwired in order to accelerate the bolt formation process, effectively turbocharging the rifle.[6] The primary damage mechanism of plasma rifles is thermal transfer, causing serious burns to soft targets and melting hard ones. In extreme cases, the plasma can cause spontaneous dissolution of the target, including separation of soft tissues from hard ones or wholesale molecular destabilization that turns the target into a viscous green fluid.[7]

Initially, the weapon was a bulky, industrial plasma caster, manufactured by Winchester Arms; while it performed admirably, it was expensive and required specialized training to use. However, later developments for the United States Army would lead to a more compact design that was cheaper to produce and easier to train for, perfectly suited for urban warfare.[8]

Also known as the Q-35 matter modulator, the V.35 quantum plasma modulation matter injection rifle was created by REPCONN Aerospace engineers as part of the Quantum Plasma Modulation Matter Injection Rifle project,[1] a research program overseen by Colonel Moretti of the United States Army,[9] who was looking for a replacement for the aging plasma rifle designs, especially the Winchester P94.[8][10]

The prototype was created by a team of engineers under the lead of Senior Staff Engineer Xuan Duong, using design specifications stolen from Poseidon Energy for the canceled plasma rifle project Semele, in conjunction with designs from their own plasma engine, the failed quantum matter modulator of the Z43-521P rocket. Poseidon data allowed the REPCONN team to rectify issues with matter inversion by using a polarized quantum spin, simultaneously solving the issues with matter conversion in the Heisenberg compensation field, enabling the creation of the first prototype of a new line of plasma weapons.[9]

With the data from the SEMELE project, REPCONN was finally able to create a functional prototype after thirty-four failures. While prototype materials make it unsuitable for prolonged field use, the Q-35 has a longer refire rate on average - but a more consistent delay between shots, an increase in active bolt charge time, increased accuracy and a 30% increase in bolt energy.[1]

When the prototype was completed, unknown individuals conspired with REPCONN's CFO Julia Masters to intercept and secure the prototype while it was in transit to the Department of Defense.[11]


It can be repaired using plasma rifles. Instead of using 2 microfusion cells like the standard model, the Q-35 matter modulator only uses 1. Its rate of fire is about 2x faster than plasma rifles, and it degrades slower than a regular plasma rifle. It also has about 50% extra DPS. It cannot be modded since its plasma bolts already have similar velocity to that of a regular plasma rifle upgraded with a magnetic accelerator. It also has a dark red and black color scheme as opposed to the normal grey; interestingly enough, the micro-fusion cells used as ammunition also follow the color scheme and appear red and black. This causes the cells to appear similar to electron charge packs.



Name Type Dmg/shot DPS Att/sec Crit mult Crit dmg Spread AP cost Ammo Ammo cap Weight Item HP Value Stat Req. Notes
Plasma rifle Energy rifle 47 65.8 1.4 x2 47 0.2 30 Microfusion cell 24 8 75 1300 Energy Weapons:25 Strength:3 Uses 2 MFC per shot
Q-35 matter modulator Energy rifle 40 96 2.4 x2 63 0.2 28 Microfusion cell 12 7 250 3000 Energy Weapons:25 Strength:2 -

Van Graff plasma rifle Energy rifle 32 44.8 1.4 x2 32 0.2 30 Microfusion cell 24 8 75 1300 Energy Weapons:0 Strength:3 Uses 2 MFC per shot
Multiplas rifle Energy shotgun 105 105 1 x1 35 1.5 35 Microfusion cell 30 7 50 2500 Energy Weapons:50 Strength:3 Uses 3 MFC per shot


REPCONN headquarters, behind the very hard locked door at first floor. The very hard terminal next to the door can also be used. Note: Not always a very hard locked door. Also, in lieu of finding keycards or terminals to upload your facial profile to, it is possible to covertly kill all Mister Handy "Mobile Facial Scanners" without setting off the alarms—however, you must kill them before they talk to you! The other Mister Handy models can be avoided or destroyed without alerting security provided you are not witnessed or told to vacate the premises in 30 seconds.

It can also be accessed without 100 Science or 100 Lockpick by going directly to the second floor. Look for the door that says 'Enter Repconn Headquarters Main Office Floor'. There will be a hole in the ground and you can jump down and the Q-35 matter modulator will be levitating in its storage case. To get back out if you do not have the skill levels mentioned above, you can just climb back up the rubble and back into the second floor. Additionally it is possible to obtain the weapon by going to the third floor and searching the brief case found near the Brotherhood of Steel paladin's corpses, it contains a keycard which grants access to the room with the Q-35 matter modulator.


  • Prior to patch, the Q-35 dealt 32 points of damage on normal hits.

Behind the scenes

The Q-35 matter modulator is a reference to the Illudium Q-36 Space Modulator, a space blaster used by Marvin the Martian, and was named by Akil Hooper.[12]


  • PCIcon pc.png PlayStation 3Icon ps3.png Xbox 360Icon xbox360.png Often, the gun will not be found floating in the middle of the capsule as shown in the images below. It will be on the floor beside the container.
  • PCIcon pc.png May crash game when placed in the purchasable weapons trunks in the Lucky 38 Presidential Suite.
  • PlayStation 3Icon ps3.png The gun may be wedged in the wall making it difficult to retrieve but if you just go up against the wall in third person you can aim at the ground and grab the gun. Another option is to use C-4 to move the gun until you can grab it.
  • PlayStation 3Icon ps3.png When placing the weapon on the floor, it will become invisible making it hard to find in open spaces. Text still appears asking whether or not to pick it up.
  • PlayStation 3Icon ps3.png Sometimes the gun will appear stuck in the bottom of the container making it difficult to get. Sometimes leaving the building then reentering will fix this.
  • Xbox 360Icon xbox360.png If picked up, the gun could cause problems with loading game, when loading a game, console reads "cannot open file because there are some mods that cannot be held", ruining the entire accounts playing ability.




SingleShotVB.png ReloadVB.png


  1. 1.0 1.1 1.2 REPCONN headquarters terminals; Terminal, Q-35 Release Notes
  2. Fallout and Fallout 2 item description: "{1500}{}{Plasma Rifle}"
    "{1501}{}{A Winchester Model P94 Plasma Rifle. An industrial-grade energy weapon, firing superheated bolts of plasma down a superconducting barrel. Powered by Micro Fusion Cells. Min ST: 6.}"
    Fallout Tactics: Brotherhood of Steel item description: "name_plasmaRifle = {Plasma Rifle}"
    "desc_plasmaRifle = {A Winchester Model P94 Plasma Rifle. An industrial-grade energy weapon, firing superheated bolts of ionised gas down a superconducting barrel. Powered by Micro Fusion Cells.}"
    (PRO ITEM.MSG (Fallout), PRO ITEM.MSG (Fallout 2), and Items.txt)
  3. Fort Independence terminals; Research Terminal, Research Log - Plasma Rifle
  4. Research Note - Plasma rifle
  5. Chris Taylor interview for
  6. Fallout and Fallout 2 item description: "{23300}{}{Turbo Plasma Rifle}"
    "{23301}{}{A modified Winchester P94 plasma rifle. The plasma bolt chamber has been hotwired to accelerate the bolt formation process. Min ST: 6.}"
    (PRO ITEM.MSG (Fallout), PRO ITEM.MSG (Fallout 2), and Items.txt)
  7. Weapon behavior in the game.
  8. 8.0 8.1 The cover of the Future Weapons Today periodical as seen in Fallout: New Vegas has a section prominently promoted entitled "Urban Plasma Rifles."
  9. 9.0 9.1 REPCONN headquarters terminals; Terminal, Inter-office Correspondence #3458503
  10. The Courier: "What kind of prototypes?"
    Arcade Gannon: "Plasma rifles. They were intended to replace the P94 plasma caster. There was some corporate espionage going on between Poseidon Energy's Project SEMELE and whatever was going on here."
    (Arcade Gannon's dialogue)
  11. REPCONN headquarters terminals; Terminal, Encrypted Message
  12. Joshua Sawyer on Formspring March 24, 2012: "Is the Q-35 Matter Modulator from F:NV named after the Illudium Q-36 Space Modulator?
    I believe so. That item was named by Akil Hooper, who designed REPCONN HQ."