McFarlane Toys/Odd Pods Series 1
From Halopedia, the Halo wiki
The Halo Odd Pods Series 1 is the first series in McFarlane's Odd Pods. They featured four different figures; two from Halo 3 Matchmaking and the other two from campaign. Odd Pods can be popped apart to have interchangeable heads, torsos and arms for countless customization possibilities, similar to how action figures have interchangeable armor.
Campaign
Master Chief
The Master Chief Odd Pod is based on the Master Chief from the Halo trilogy. It comes with an MA5C Assault Rifle specially made for Odd Pods.
Brute Chieftain
The Brute Chieftain Odd Pod is from the Brute Chieftains in Halo 3 campaign. It comes with a mini Gravity Hammer.
Matchmaking
Spartan EVA
The Spartan EVA Odd Pod is a Spartan figure in red EVA armor. It is equipped with an MA5C Assault Rifle.
Spartan EOD
The Spartan EOD Odd Pod is a Spartan figure in steel EOD armor. It is equipped with an MA5C Assault Rifle. There was a chase model produced that was yellow in colour and only 302 of them were made.