Fallout 4 - When Pigs Fly - Suggs & Marvin - Makeshift Weapon Pack - Creation Club - Part 1

You can pick who you choose to help in this quest. By helping Marvin, you get a Kneecapper grenade launcher. You will lose the one from Suggs' quest. Up to you. I go with Suggs because he remains a merchant to trade with afterward. Marvin tries to kill you and Suggs.