"Yeah, I'm hoping I can build up a reputation with this. 'The mysterious man and his deadly sequin pistol.' I want the sight of purple sparkles to strike fear in the hearts of my enemies. I think I can pull it off."

Building any kind of reputation at all would undermine his ability to gather intel, but it's a fun fantasy. If he ever comes back the Commonwealth permanently, he may have to retire the gun but for now he likes his pistol. He likes that the Girl enjoyed making it and likes that it made Ava laugh.