The 500 Master Chief was a promotional Halo ActionClix figure. It was available as a promotional product, and can no longer be found in the Target stores that it was exclusive to. This figure features John-117 from Halo 3, wielding an MA5C Assault Rifle.
MA5C ASSAULT RIFLE: When this unit succeeds at a shot and the attack roll is doubles, this unit can shoot again at any target.
FULL BURST: When this unit succeeds at a shot and the attack roll is doubles, the shot deals an extra two damage.
HAND TO HAND ATTACK: When this unit succeeds at a shot against an adjacent unit, the shot deals an extra one damage.