Talk:Mastery Rank/@comment-50.205.174.10-20150217171645/@comment-24136187-20150217173013

They are no longer distributed in-game.

Simply put, anything with Wraith/Vandal/Dex in its name (about 11 weapons), the Gorgon, Boar, Snipetron and Machete (4 weapons, though 2 of them can be obtained by other methods), and any piece of equipment associated with the Founders' program (2 weapons and 1 frame).