To get the Hawkmoon Catalyst you need to complete the Harbinger mission which unlocks after completing the main Hawkmoon quest. After the catalyst is obtained you need to masterwork the catalyst to be able to use it (if you don’t want to spend your time on masterworking the catalyst then you can select the “Catalyst Masterwork” extra option). This Catalyst upgrades the Hawkmoon to a 2.0 version with increased magazine size as well as the handling, range, and reload speed for every precision shots making it a better weapon for all activities.
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