
The Edge of Fate expansion brought back an updated version of an old event to Destiny 2 in the form of Arms Week. Each Arms Week focuses on one weapon archetype, offering quests, challenges, and rewards related to the featured archetype.
During the Arms Week, you can farm Combat Telemetry to exchange it for loot at Ada-1 in the Shooting Range. This includes new weapons featured that week and a range of returning weapons that, while not part of the new tier system, are still potent with the right roll.