First born helmets/armor?

Any classic first born helmets spotted yet? MK3 Iron armor, MK4, MK6 Beakies, MK7 and MK8 the CLASSIC DEFINITIVE Space marine helmets.

nothing wrong with primaris helmets but they are so barebones, uniform and lack the OG 40k aesthetic not to mention Space marine 1 having all sorts of helmets. Kind of a deal breaker to not include these helmets at launch.

No, I don't care that all the loyalist marines are primaris, there are first born who crossed the rubicon. And there are sternguard and vanguard veterans.