This is a When Pigs Fly quest walkthrough for Fallout 4 (FO4). Learn how to complete and start When Pigs Fly, as well as the new weapon rewards from When Pigs Fly!

When Pigs Fly Walkthrough

When Pigs Fly Objectives

1. Investigate the merchant workshop.
2. Visit the competing shop at Monsignor Plaza.
3. Read the store note.
4. Find Marvin and retrieve the schematics.
5. Return the schematics to Suggs.

1. Find the Merchant Workshop

The merchant workshop is located in Cambridge, between Kendall Hospital and Cambridge Crater. When in doubt, follow the quest marker to the location on your map.

The merchant workshop is called Sugg's Garage, which is where you'll be able to buy the new weapons such as the Nail Gun and Saw Blade Launcher. Head inside and interact with the terminal marked by the quest.

Suggs Location and Inventory

Interact with the Terminal Inside

Select the third option, Weapons Dealer in Monsignor Plaza, after opening the terminal. This will tell you about another shop that opened and advance the quest.

2. Visit the Competing Shop at Monsignor Plaza

Follow the quest marker heading east from Suggs' Garage to just south of the Monsignor Plaza marker. The quest leads you to a green door right next to a body of water. There are mines leading up to the door so be careful.

Clear the Gun Shop

Enter the door and prepare to fight some enemies inside. You should save at the entrance before initiating combat. Defeat the enemies and continue heading up the stairs to the 3rd floor to find the gun shop.

The gun shop will have more enemies inside, clear the area first before doing anything else.

3. Read the Store Note

Head inside the gun shop and you'll find Marvin's Note on the front desk. Read it to advance the quest. The note will tell you about an ambush that Marvin is planning to do on Suggs. Follow the quest marker to find Marvin setting up near Suggs' garage location.

4. Find Marvin and Retrieve the Schematics

Head back to Suggs' garage and you'll find Marvin waiting on top of a building right next to it with his guards.

Retrieve the Grenade Launcher Schematics

Defeat Marvin and his store security on top of the building roof and take the Grenade Launcher Schematics from his body.

5. Return the Schematics to Suggs

Protect Suggs from additional Marvin's Store Security that comes after him after killing Marvin. Keep him alive and return the grenade launcher schematics to him.

When Pigs Fly Rewards

Penetrating Chinese Grenade Launcher

Weapon	Damage	Weight
Penetrating Chinese Grenade Launcher	250 Physical	21.4

The quest rewards you with the Penetrating Chinese Grenade Launcher that uses 40mm Frag Grenades for ammo. The weapon has an effect that ignores 30% of the target's damage and energy resistance.

Best Weapons

Other Obtainable Weapons During When Pigs Fly

Item	Where to Get
Piggy Bank Mine	Inside the Gun Shop office at Monsignor Plaza on one of the counters.
Rapid Pipe Grenade Launcher	Inside the Gun Shop office at Monsignor Plaza on top of the front desk counter.
Piggy Bank Fat Man	Looted from Marvin during the ambush at Suggs' garage.
Baseball Launcher	Looted from one of Marvin's Store Security that attacks Suggs after killing Marvin.

How to Unlock When Pigs Fly

Automatically Added to Quest List

When Pigs Fly is automatically added to your quest list in the Pipboy after exiting the vault as a new character or loading a previous character from before the 2024 next-gen update.

Fallout 4 Related Guides

All Side Quests List and Best Side Quests

Side Quest Guides