Hey there. While the shader could drop on weapons earned during Season of Dawn's Iron Banner, the only way to unlock the shader in collections was to complete Season 9's Iron Banner questline, unimaginatively named "Iron Banner: Season 9".
It was never possible to obtain the shader through a dismantle, and still isn't, despite the shader collection text having the standard text about being earned that way.
English
-
Didn't Bungie themselves in a TWAB say all shaders would be added back to there respectable playlist for players who missed out? I know crucible and gambit do.
-
Hey there. The Gambit overhaul mentioned the following change, [quote]Older Gambit shaders now have a small chance of dropping at the end of each match. [/quote] I don't remember it happening for Crucible in general nor for Iron Banner.