McFarlane Toys/Halo Helmet Wave 1
From Halopedia, the Halo wiki
McFarlane Toy's Halo Helmet Wave 1 is a series of action figure helmets based on Halo 3's multiplayer characters. They cannot be placed on the original figures, as they come on a base. All of the helmets feature Spartan helmets.
Set 3 has three helmets: Master Chief's helmet, CQB, and Rogue. All are different colors.
Set 4 has three helmets: EVA, Hayabusa, and EOD. All are different colors.
Set 5 of the Helmet Wave was not listed on McFarlane's site, nor were photos released of the helmets, yet it appeared in stores with the other sets. It contains three helmets: EOD, CQB, and Mark VI.