The Prototype UP77 "Limitless Potential" is a unique laser gun in Fallout 4.
Characteristics[]
This unique laser gun possesses the Never Ending effect, which grants an unlimited ammo capacity and never needs to be reloaded, but still requires fusion cells to fire.
Weapon modifications[]
The specific weapon modifications fitted to the gun when found are level dependent and will vary.
| Slot | Mod | Description | Modified name | Science! rank | Form ID |
|---|---|---|---|---|---|
| Capacitor | Standard capacitor | Standard. | - | - | 001A8A88 |
| Photon exciter | Improved critical shot damage and accuracy. | Excited | - | 00187AA2 | |
| Beta wave tuner | Adds burning damage. Improved range. | Incendiary | - | 00187AA0 | |
| Boosted capacitor | Improved damage. Reduced ammo capacity. | Boosted | - | 00187AA4 | |
| Photon agitator | Superior critical shot damage, accuracy and ammo capacity. | Agitated | - | 00187AA3 | |
| Gamma wave emitter | Adds better burning damage. Better range and ammo capacity. | Fiery | 1 | 00187AA1 | |
| Maximized capacitor | Better damage. | Maximized | 2 | 00187AA7 | |
| Boosted photon agitator | Superior critical shot damage and ammo capacity. Better accuracy. Improved damage. | Boosted agitated | 2 | 00187AA6 | |
| Boosted gamma wave emitter | Adds better burning damage. Superior ammo capacity. Better range. Improved damage. | Boosted fiery | 2 | 00187AA5 | |
| Overcharged capacitor | Superior damage. Improved ammo capacity. | Overcharged | 3 | 00187AA8 | |
| Barrel | Short barrel | Standard. | Short (for rifles) | - | 00187A8E |
| Long barrel | Better range. Improved damage, sighted accuracy and recoil. Reduced ammo capacity. Poor hip-fire accuracy. | Long (for pistols) | - | 00187A8C | |
| Automatic barrel | Improved rate of fire, range and sighted accuracy. Worse recoil. Reduced ammo capacity. Poor hip-fire accuracy. | Automatic | 1 | 00187A90 | |
| Sniper barrel | Superior damage and range. Worse recoil. Poor ammo capacity and hip-fire accuracy. | Charging | 1 | 00187A92 | |
| Improved short barrel | Improved damage. | Improved short (for rifles) Improved |
1 | 00187A8F | |
| Improved long barrel | Better damage and range. Improved sighted accuracy and recoil. Reduced ammo capacity. Poor hip-fire accuracy. | Improved long (for pistols) Improved |
2 | 00187A8D | |
| Improved automatic barrel | Superior rate of fire. Improved damage, range and sighted accuracy. Worse recoil. Reduced ammo capacity. Poor hip-fire accuracy. | Improved automatic | 2 | 00187A91 | |
| Improved sniper barrel | Exceptional damage. Superior range. Worse recoil. Poor ammo-capacity and hip-fire accuracy. | Improved charging | 2 | 000187A3 | |
| Grip | Standard grip | Standard. | Pistol | - | 001A8A87 |
| Comfort grip | Improved recoil and hip-fire accuracy. | Comfort grip pistol | - | 00187A94 | |
| Short stock | Exceptional sighted accuracy. Better recoil and aim with scopes. Improved bash. | Rifle | - | 00187A99 | |
| Sharpshooter's grip | Better recoil and hip-fire accuracy. | Sharpshooter's pistol | 1 | 00187A95 | |
| Full stock | Exceptional sighted accuracy. Better recoil and aim with scopes. Improved bash. | Rifle | 1 | 00187A96 | |
| Markman's stock | Exceptional sighted accuracy. Superior recoil and aim with scopes. Improved bash. | Marksman's rifle | 2 | 00187A97 | |
| Recoil compensating stock | Exceptional sighted accuracy and recoil. Better aim with scopes. Improved bash. | Recoil compensated rifle | 2 | 00187A98 | |
| Sight | Standard sights | Standard. | - | - | 0001D374 |
| Improved sights | Improved focus and sighted accuracy. | Sighted | - | 00187AB2 | |
| Short scope | Improved magnification. Superior sighted accuracy. | Scoped | - | 00187AAD | |
| Reflex sight | Better focus and sighted accuracy. | Tactical | 1 | 00187AB1 | |
| Medium scope | Better magnification. Superior sighted accuracy. | Scoped | 1 | 00187AAB | |
| Long scope | Superior magnification and sighted accuracy. | Scoped | 2 | 00187AA9 | |
| Short night vision scope | Night vision. Improved magnification. Superior sighted accuracy. | Night-vision | 2 | 00187AAE | |
| Medium night vision scope | Night vision. Better magnification. Superior sighted accuracy. | Night-vision | 2 | 00187AAC | |
| Long night vision scope | Night vision. Superior magnification and sighted accuracy. | Night-vision | 2 | 00187AAA | |
| Short recon scope | Tracks targets. Improved magnification. Superior sighted accuracy. | Recon | 3 | 002492DC | |
| Long recon scope | Tracks targets. Superior magnification and sighted accuracy. | Recon | 3 | 00187AB0 | |
| Muzzle | No muzzle | - | - | - | - |
| Beam splitter | Splits beams into multiple projectiles covering a wider area. Poor accuracy and range. | Scattered | 1 | 00187A9E | |
| Beam focuser | Better range, accuracy, and recoil. | Focused | 1 | 00187A9C | |
| Gyro compensating lens | Superior recoil. Reduced range. | Targeting | 1 | 00187A9A | |
| Amplified beam splitter | Splits beams into multiple projectiles covering a wider area. Reduced accuracy. Poor range. | Improved scattered | 2 | 00187A9F | |
| Fine-tuned beam focuser | Super range and accuracy. Better recoil. | Improved focused | 2 | 00187A9D | |
| Quantum gyro compensating lens | Exceptional recoil. Reduced range. | Improved targeting | 3 | 00187A9B |
Variants[]
- Laser gun, the standard variant.
- Old Faithful, a unique laser pistol with the Instigating effect, which does double damage if the target is at full health. It is sold by Arturo Rodriguez in Diamond City.
- Survivor's Special, a unique laser pistol with the Bloodied effect, which deals more damage the lower your health is. It is a potential reward for completing The Lost Patrol, or it can be stolen from Paladin Brandis before completing the quest.
- Good Intentions, a unique laser rifle with the Enraging effect which, on critical hits, causes targets to frenzy. It is carried by Clint.
- Righteous Authority, a unique laser rifle. With the Lucky effect, its critical hits do double damage and the critical meter fills 15% faster. It is given as a reward for completing Call to Arms.
- Wazer Wifle, a unique laser rifle with the Never Ending effect, which gives the weapon unlimited ammo capacity and remove the need for reloading. It is given as a reward for completing three unmarked quests for Shaun after finishing the main quest with any faction.
Protectron's Gaze, a unique laser pistol with the Rapid ability, boosting its fire rate by 25% and its reload time by 15%. It is carried by the Mechanist.
Location[]
University Point, University Credit Union: Inside the Credit Union bank vault, locked behind a Novice-locked terminal. The prototype is located inside a hidden compartment on the right-hand wall opened using a red button inside a Master-locked safe on the second row of the wall safes. The prototype is on the large table in the middle of the room.
Notes[]
In the Prima game guide, this weapon is falsely listed as Prototype PA77. It also says it is inside of a safe.
Bugs[]
Two prototype UP77's with different mods installed may spawn.[verified]
Gallery[]
Pistol variant
Shotgun rifle variant
Sniper rifle variant
