As well as, strike completions, crucible or gambit.
Messy Business will have you getting grenade kills, and/or grenade launcher kills to gain progress. How to get Salvager's Salvo? Well, to start the quest, head to banshee in the Tower, he'll give you the quest Messy Business.
Salvager's Salvo is the new Ritual Grenade Launcher now available in Destiny 2 Season of the Chosen.
