Here are the activities that give improved weapons
How to Improve Your God Scrolls (Adept Weapon Crafting) | Destiny 2 Lightfall
Enhancing weapon perks in Destiny 2 is something that used to be exclusive to craftable weapons back in The Witch Queen. But starting with The Final Shape, every new weapon in the game is one you can either craft or improve, and you'll be able to improve some beloved old weapons too, like the BRAVE Arsenal.
In this Destiny 2 guide, I'll show you how to improve weapons and give you details on which weapons you can improve starting with The Final Shape.
When you get a weapon that can be improved, you'll see a small box next to it where the Masterwork sits.