For an overview of laser pistol models throughout the Fallout series, see Laser pistol. |

Prototype UP77 "Limitless Potential" | |||||||||||||||||||||||||||||||||||||||||||||||||||

| |||||||||||||||||||||||||||||||||||||||||||||||||||

This item is generated from leveled lists, based on the player's level. Data shown refers to preset elements guaranteed to spawn. | |||||||||||||||||||||||||||||||||||||||||||||||||||

[[Category:Fallout 4 unique laser pistol/rifles]]

The **Prototype UP77 "Limitless Potential"** is a unique energy weapon that can be found and obtained within the Commonwealth, in *Fallout 4*.

## Contents

## Background

The weapon was the brainchild of Leslie Mathews and Curtis Marsh, graduate students aiding Prof. Campbell in his energy research. Although originally working under his strict supervision, Campbell eventually gave them unrestricted access to the laboratory to compensate for the Dean's interference.^{[1]} Their work focused on plasmon containment and increasing energy efficiency in nuclear reactors,^{[2]} and they eventually achieved a breakthrough in October, focusing the electron beam down to around 200 nanometers, achieving improved efficiency and grouping. Although the result was ill-suited for reactor containment, it did promise improved energy consumption for industrial applications and weapons.^{[3]}

However, their research would have no effect on the war effort. On October 23, as Mathews and Marsh were presenting their findings to Sergeant Rivera, the team's liaison, the nuclear attack on the United States began. The sergeant left the laboratory to investigate, asking the young researchers to stay behind until it was safe. He did not return - and Campbell, originally scheduled to arrive around noon, never reached the laboratory. The two researchers stayed underground for the next several weeks, ignoring the explosions continuing above ground.^{[4]} To pass the time and preserve their sanity, they focused on their research, tightening the electron beam on the laser using modified parabolic reflectors. The stocks of food and water kept on site by Campbell definitely helped, allowing them to survive for weeks.^{[5]} Finally, several weeks after the Great War, the two managed to tighten the wavelength down to around 75 nanometers and achieving an impressive capture rate and tremendous power capacity for each of their prototypes. At that point, however, they were already out of food and almost out of water, forcing the researchers to abandon the lab, after exchanging marriage vows. They left this unique laser rifle behind in the safe.^{[6]}

## Characteristics

This unique laser rifle features an unlimited ammo capacity, and as such, never needs to be conventionally reloaded, so long as the Sole Survivor keeps a consistent store of fusion cells within their inventory.

## Modifications

### Capacitor

Slot | Damage | Fire Rate | Range | Accuracy | Weight | Value | Resources | Required Perks | |
---|---|---|---|---|---|---|---|---|---|

Standard | Base | +2.5% | +2.5% | 1x Adhesive 2x Circuitry |
None | ||||

Photon Exciter (Better Criticals I) | +100% critical charge
+100% critical damage multiplier |
0 | 0 | +10% | +10% | +5% | 1x Adhesive 2x Circuitry |
None | |

Beta Wave Tuner
(Armor Piercing I) |
Sets target on fire for 3 sec (3x magnitude) | +10% | +10% | +10% | 2x Adhesive 2x Circuitry |
None | |||

Boosted Capacitor
(More Damage I) |
+25% | +10%
-10% capacity |
+15% | 2x Adhesive 5x Circuitry |
None | ||||

Photon Agitator
(Better Critcials II) |
+200% critical damage multiplier | +20% capacity | +15% | +20% | +20% | 3x Adhesive 5x Circuitry |
Science! 1 | ||

Gamma Wave Emitter
(Armor Piercing II) |
Sets target on fire for 3 sec (5x magnitude) | +20% capacity | +20% | +20% | +25% | 4x Adhesive 5x Circuitry |
Science! 1 | ||

Maximized Capacitor
(More Damage II) |
+50% damage | +20% | +30% | 5x Adhesive 6x Circuitry |
Science! 2 | ||||

Boosted Photon Agitator
(More Damage + Better Criticals II) |
+25% damage
+200% critical damage multiplier |
+30% capacity | +15% | +30% | +35% | 6x Adhesive 6x Circuitry |
Science! 2 | ||

Boosted Gamma Wave Emitter
(More Damage + Armor Piercing II) |
+25% damage
Sets target on fire for 3 sec (5x magnitude) |
+20% | +30% | +30% | 7x Adhesive 6x Circuitry |
Science! 2 | |||

Overcharged Capacitor
(More Damage III) |
+75% damage | +10% capacity | +30% | +45% | 8x Adhesive 8x Circuitry |
Science! 3 |

### Barrel

Slot | Damage | Fire Rate | Range | Accuracy | Weight | Value | Resources | Required Perks | |
---|---|---|---|---|---|---|---|---|---|

Short Barrel | -10% AP cost | 9 x Base | +10% accuracy
-10% recoil |
+25% | +5% | 1x Adhesive 1x Circuitry 2x Fiber Optics 2x Glass 2x Plastic 2x Screw |
None | ||

Long Barrel | +9.6% | +10% AP cost
+3% iron sights transition -10% capacity |
16 x Base | +40% sighted accuracy
-50% hip fire accuracy -15% recoil |
+50% | +10% | 1x Adhesive 2x Circuitry 3x Fiber Optics 2x Glass 5x Plastic 3x Screw |
None | |

Automatic Barrel | -25% | Full auto
+25% AP cost +3% iron sights transition -10% capacity |
16 x Base | +20% sighted accuracy
-100% hip fire accuracy |
+60% | +15% | 2x Adhesive 2x Circuitry 3x Crystal 5x Fiber Optics 4x Gear 1x Oil 7x Plastic 4x Screw 2x Silver |
Science! 1 | |

Sniper Barrel | +75% damage at full charge (3 sec)
-50% snap fire |
Charging
+35% AP cost +5% iron sights transition -70% capacity |
18 x Base | +20% sighted accuracy
-100% hip fire accuracy |
+60% | +20% | 2x Adhesive 3x Circuitry 4x Crystal 8x Fiberglass 10x Plastic 5x Screw 2x Silver |
Science! 1 | |

Improved Short Barrel | +21% | -10% AP cost | 9 x Base | +10% accuracy
-10% recoil |
+25% | +25% | 2x Adhesive 2x Circuitry 1x Crystal 2x Fiberglass 3x Fiber Optics 3x Glass 2x Screw 3x Silver |
Science! 1 | |

Improved Long Barrel | +34% | +10% AP cost
+3% iron sights transition -10% capacity |
16 x Base | +40% sighted accuracy
-50% hip fire -15% recoil |
+50% | +30% | 4x Adhesive 3x Circuitry 1x Crystal 5x Fiberglass 6x Fiber Optics 4x Glass 4x Screw 4x Silver |
Science! 2 | |

Improved Sniper Barrel | +125% damage at full charge (3 sec)
-50% snap fire |
Charging
+35% AP cost +5% iron sights transition -70% capacity |
18 x Base | +20% sighted accuracy
-100% hip fire accuracy |
+50% | +40% | 5x Adhesive 5x Circuitry 6x Crystal 10x Fiberglass 16x Fiber Optics 4x Gold 6x Screw 2x Spring |
Science! 2 | |

Improved Automatic Barrel | -15% | Full auto
+25% rate of fire +25% AP cost +3% iron sights transition -10% capacity |
16 x Base | +20% sighted accuracy
-100% hip fire accuracy |
+60% | +35% | 4x Adhesive 4x Circuitry 5x Crystal 7x Fiberglass 10x Fiber Optics 6x Gears 3x Gold 1x Oil 5x Screw |
Science! 2 |

### Grip

- Adding a stock will turn the pistol into a Laser rifle.

Slot | Damage | Fire Rate | Accuracy | Weight | Value | Resources | Required Perks | |
---|---|---|---|---|---|---|---|---|

Standard Grip | -50% bash damage | -10% AP cost | +2.5% | +2.5% | 1x Adhesive 2x Plastic 2x Screw |
None | ||

Comfort Grip | -50% bash damage | -10% AP cost | +5% accuracy
-5% recoil |
+5% | +10% | 2x Adhesive 4x Plastic 3x Screw |
None | |

Short Stock | +20% AP cost
+5% iron sights transition |
+7% stability
+40% sighted accuracy -15% recoil |
+20% | +20% | 2x Adhesive 7x Plastic 5x Screw |
None | ||

Sharpshooter's Grip | -50% bash damage | -15% AP cost | +15% accuracy
-15% recoil |
+10% | +25% | 3x Adhesive 4x Fiberglass 4x Steel |
Science! 1 | |

Full Stock | +20% AP cost
+10% iron sights transition |
+7% stability
+40% sighted accuracy -20% recoil |
+30% | +30% | 4x Adhesive 10x Plastic 6x Screw |
Science! 1 | ||

Marksman's Stock | +20% AP cost
+10% iron sights transition |
+9% stability
+40% sighted accuracy -25% recoil |
+40% | +40% | 5x Adhesive 10x Fiberglass 1x Rubber 6x Screw 3x Spring |
Science! 2 | ||

Recoil Compensating Stock | +20% AP cost
+10% iron sights transition |
+7% stability
+40% sighted accuracy -30% recoil |
+45% | +50% | 6x Adhesive 11x Fiberglass 1x Rubber 8x Screw 6x Spring |
Science! 2 |

### Sights

Slot | Effect | Accuracy | Weight | Value | Resources | Required Perks | |
---|---|---|---|---|---|---|---|

Standard Sights | Base | +2.5% | +2.5% | 1x Adhesive 2x Plastic |
None | ||

Improved Sights | +5% iron sight transition | +5% sighted accuracy | +2.5% | +5% | 1x Adhesive 2x Plastic |
None | |

Short Scope | x4 scope +10% iron sight transition +30% AP cost |
-20% stability +20% sighted accuracy |
+20% | +20% | 2x Adhesive 2x Glass 4x Plastic 2x Screw |
None | |

Reflex Sight | x2 zoom -15% AP cost -10% iron sights transition |
+15% sighted accuracy | 0+10% | +25% | 2x Adhesive 2x Fiberglass 2x Fiber Optics 2x Glass 1x Nuclear Material 2x Screw 1x Silver |
Science! 1 | |

Medium Scope | x6 scope +40% AP cost +15% iron sights transition |
-20% stability +20% sighted accuracy |
+25% | +40% | 3x Adhesive 3x Glass 5x Plastic 2x Screw |
Science! 1 | |

Long Scope | x10 scope +50% AP cost +2% sighted transition |
-20% stability +20% sighted accuracy |
+30% | +50% | 4x Adhesive 5x Glass 6x Plastic 2x Screw |
Science! 2 | |

Short Night Vision | x4 scope (night vision) +10% iron sight transition +30% AP cost |
-20% stability +20% sighted accuracy |
+20% | +20% | 4x Adhesive 2x Circuitry 4x Fiberglass 3x Fiber Optics 3x Glass 2x Nuclear Material 2x Screw 2x Silver |
Science! 2 | |

Medium Night Vision | x6 scope (night vision) +40% AP cost +15% iron sights transition |
-20% stability +20% sighted accuracy |
+25% | +75% | 4x Adhesive 3x Circuitry 5x Fiberglass 5x Fiber Optics 5x Glass 3x Nuclear Material 2x Screw 2x Silver |
Science! 2 | |

Long Night Vision | x10 scope (night vision) +50% AP cost +2% sighted transition |
-20% stability +20% sighted accuracy |
+30% | +85% | 5x Adhesive 5x Circuitry 6x Fiberglass 6x Fiber Optics 6x Glass 2x Gold 4x Nuclear Material 2x Screw |
Science! 2 | |

Short Recon Scope | x4 scope (monochrome, tracks targets) +10% iron sight transition +30% AP cost |
-20% stability +20% sighted accuracy |
+20% | +100% | 6x Adhesive 6x Circuitry 8x Crystal 6x Fiberglass 8x Fiber Optics 3x Gold 5x Nuclear Material 3x Screw |
Science! 3 | |

Long Recon Scope | x10 scope (monochrome, tracks targets) +50% AP cost +2% sighted transition |
-20% stability +20% sighted accuracy |
+35% | +100% | 6x Adhesive 6x Circuitry 8x Crystal 6x Fiberglass 8x Fiber Optics 3x Gold 5x Nuclear Material 3x Screw |
Science! 3 |

### Muzzle

Slot | Effect | Fire Rate | Range | Accuracy | Weight | Value | Resources | Required Perks | |
---|---|---|---|---|---|---|---|---|---|

No Muzzle | None | ||||||||

Beam Splitter (scattergun) | +10% damage Splits beam into four projectiles |
-10% | -2 x Base Damage nullified beyond maximum range |
Override: High recoil, low accuracy | +15% | +10% | 3x Adhesive 2x Glass 4x Plastic 3x Screw 2x Silver |
Science! 1 | |

Beam Focuser (extended range) | +2 x Base | +20% accuracy -15% recoil |
+20% | +15% | 3x Adhesive 2x Glass 4x Plastic 2x Screw 2x Silver |
Science! 1 | |||

Gyro Compensating Lens (compensator) | -1 x Base | -25% recoil | +30% | +20% | 2x Adhesive 2x Circuitry 3x Glass 5x Plastic 2x Screw 3x Silver 2x Spring |
Science! 1 | |||

Amplified Beam Splitter (scattergun II) | +10% damage Splits beam into four projectiles |
-10% | -2 x Base Damage nullified beyond maximum range |
Override: High recoil, low accuracy (+25% accuracy vs. regular splitter) | +15% | +40% | 4x Adhesive 6x Fiberglass 4x Glass 3x Gold 4x Screw |
Science! 2 | |

Fine-Tuned Beam Focuser (extended range II) | +3 x Base | +30% accuracy -15% recoil |
+20% | +30% | 4x Adhesive 7x Fiberglass 4x Glass 3x Gold 4x Screw |
Science! 2 | |||

Quantum Gyro Compensating Lens (compensator II) | -1 x Base | -35% recoil | +30% | +35% | 5x Adhesive 2x Circuitry 8x Fiberglass 4x Glass 3x Gold 5x Screw 3x Spring |
Science! 3 |

## Variants

- Pistols

- Rifles

- Level-dependent

## Locations

The UP77 is found at University Point, inside of the Credit Union, where the Sole Survivor can discover a bank vault locked behind a Novice terminal. After hacking through the vault door, the Sole Survivor will find themselves inside, where they will have access to the safety deposit safes within. Upon discovering a Master locked safe, a red button will be revealed, and upon pressing it, a hidden room will become accessible, which leads to the prototype laser rifle. This weapon can serve as an alternative to the Wazer Wifle.

## References

- ↑ University Point terminals; Professor's Terminal, [CMarsh] - More time for the project
- ↑ University Point terminals: "
*Progress on the project has been slow so far, mostly because the Dean has been having Prof. Campbell tailed to try to figure out where the lab is. Curtis brought up the idea of giving us unrestricted access to the lab, but Prof. Campbell said that he needs to make sure things are established and safe first. Thus far we've had trouble in containing the plasmon scattering from the electron beam. I've checked and rechecked the professors calculations and they seem good, but it just doesn't replicate in our practicals.*" - ↑ University Point terminals: "
*Progress has improved now that Curtis and I have full access to the lab. My parents think I've gotten a job at the credit union and have been pushing me to go into banking. If they knew Mr. Rivera is actually a sergent undercover, they would flip. We've been having much better results with containing the plasmons since we decided to try focusing the electron beam down to around 200 nm. The scattering patterns are showing up with much better grouping on the Cathodeluminescence graph. At this scale it may not end up being any good for reactor containment, but we might at least be able to improve energy consumption for small industrial or weaponry uses.*" - ↑ University Point terminals: "
*I don't know what's going on out there. Curtis and I were in early on Saturday so we could try to get through the days experiments in time to go catch a movie when we heard the sirens. Some sort of EMP knocked out the power for a few minutes and Sgt. Rivera told us to stay in the lab and not to leave till he gave us the all clear. But it's been three days and we can hear explosions going off. Prof. Campbell was supposed to be in around noon, but never showed up and our friends and parents are out there. Curtis says everything will be okay, but I can see in his eyes that he's just trying to keep it together.*" - ↑ University Point terminals: "
*We've been in here a few weeks now according to the date on the terminal. An explosion took out the tunnel to the parking garage just after I made my last log entry. It's quieter, but every few hours we still hear explosions. We've decided to try to continue the research. If we are at war it might help, and if nothing else it will help us pass the time. I've been thinking that if we adjust the angle to the parabolic reflector and focus the electron beam even further it might get us what we need. Prof. Campbell had the lab stocked with plenty of food and water so we should be safe here for at least a few more weeks.*" - ↑ University Point terminals: "
*Small scale seemed to be the right direction. We brought the wavelength down to around 75 nm and have been getting a pretty impressive capture rate. Both of the prototypes are running at a much higher capacity. We ran out of food a couple days ago, and only have a couple cans of water left, so we have no choice but to to leave the lab. We've no idea what we'll find out there or if anyone is still alive, but we've decided to leave one of the prototypes here, in case Prof. Campbell made it out, so he'd know we finish it. Maybe its a futile gesture, but Curtis agreed with me. He asked me to marry him. If there's anything left out there. I said yes.*"