(Almost) same helmet I had in Halo 4 and Halo 3, Mark V Alpha =)
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> I got my dream helmet: Decimator. I would love to see an accurate Mark V helmet in future updates though!
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Absolutely!
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> I got mine. The Scout helmet from Halo 3. Not the most adventurers I know but I just love the look of it
Same but my dream helmet (which I have) is the original scout helmet from Halo 5/4
mine is the scanner helmet, if i ever get it my life will be complete. and maybe if i’m lucky get it with the decimator armor. i can dream
Or Deadeye
SPI. Like, an actual SPI helmet.
Halo 3 recon!
was always the one i didnt ave. and now that i got em all i dont like any of em
Mark IV (Halo Wars armor), I already have it 
fotus sychronize
who is your favorite OSIRIS member
the operator helmet from reach
Mark IV. I’m living the dream.
Mine is Mark VI. I think MC helmet is -Yoink!-
FOTUS!
Ghost of Onyx SPI armor
Operator helmet from Reach. Actually everything from Reach.
Recon, already got one but it takes me back to the days of seeing bungie employees wearing them in Halo 3, theirs still something holy about them to me 
Eod helmet
My favorite helmet would be the Mark V. That with a mix between Mark V and mark VI armor.
As much as I like new armors, originality and classic is always a nice and easy choice to go with.