Complete activities in Vanguard, Gambit, and Crucible playlists; defeat targets while using Trespasser. Higher tier Nightfall completions, Gambit or Crucible wins, and defeating Guardians provides additional progress.
Calibrate data and defeat targets while using Trespasser.
Calibration occurs when you complete Portal activities. Crucible wins provide additional progress.
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"What's this?" Banshee looks the weapon over for a few seconds without familiarity.
"It just needs calibration, not a smith. Take it out into the field and run the numbers."