There's plenty of Mag helmet designs at the moment, and this one deserves to be added. Some say it's long, big, oversized overall, but I can't agree with that. The helmet might be just a bit long because of the glowing parts on the back, but I'd say it doesn't need to be changed. Overall I love the helmet shape and I love the particle effects on the visor.
If you don't make it in Tennogen with this, try redesigning it for Valkyr.

Upvoted, best of luck!