With the drop chance being extremely low and the only special things about them are the shiny ornaments and double perks and that’s it.
Adding adept mods with them will give the weapons a special touch also with them leaving when final shape releases.
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They're not Adept though. They're like the vendor "Prestige" weapons that come with multiple perk options. And a masterwork and a crappy skin that doesn't take shaders. But you can get one from tokens. You can get tokens from bounties that you can complete in patrols. Hardly Adept status tbf.