It could be you have to finish the NES003 quest first but I dont know. I've done a ton of Breach runs over the past month and havnt found one yet after picking up a ton of Radiolite samples. The other 2 came quick and easy so where the hell is the Iridescent 400g piece. I've done a few runs since finishing that NES003 quest and nothing yet but I'm hoping soon. Edit....After running over 20 Breach runs since finishing the NES003 quest it still hasnt dropped and Im sick of it. Oh but Im getting the purple samples I already got (the rare 400g Crimson and Ivory pieces) to drop again which is just a complete slap in the face. On top of all this I am out of Hammer Charges and am relying on teammates now to smash the piston. Last 2 breach runs I finished never even gave me a hammer charge so im stuck at 0. Wow Bungie, This is seriously absurd, it should not be this hard and I've put in more than enough time and gameplay to have gotten this sample by now like cmon. Edit #2....I've now done 5 straight legend Breach runs without getting a hammer charge, So im still stuck on zero, still relying on teammates to smash the piston, and of course still havnt seen hide nor hair of the 400g Iridescent sample. Give me back the Coil please.