Talk:Mastery Rank/@comment-81.106.107.132-20140821140935/@comment-24.209.175.161-20140821180134

^ It means if you didn't level it to 30 the first time, you can still rebuy the weapon and top it off. (Just it starts at 0 again, even though you retain all mastery points.  In theory: you can never *lose* mastery points; only gain them.)