Joyride Studios/Halo 1 Mini Sets
From Halopedia, the Halo wiki
There were two Campaign 2-Packs released. Each of the figures in the packs are three inches tall.
The Campaign 5-Packs were released in two different packs. All the figures are three inches tall.
There were two Slayer 2-Packs released. They are based on the multiplayer gametype, Slayer. All of the figures are three inches tall.
There were two Slayer 5-Packs released. All of the figures are three inches tall.
On each action figure unit, Joyride has included a serial number, which allows you to find out when the action figure was created. The date code has four numbers followed by 'SS' actually stamped or embossed in the cardboard. The first three digits are the date the product was made, and the fourth digit is the year. For example: 2653SS means the product was manufactured on the 265th day of 2003 (9/23/2003).