If you've ever seen any of 3A's other Halo Spartan figures then you know what to expect from their Master Chief figure-- although I'm willing to bet that 3A has done an even more masterful job on the star of the Halo series.
He stands 13.5" tall and includes 35 points of articulation, LED light up helmet, 2 rifles and knife. The rifles attach to his back via a magnet.
There is also a Bambaland exclusive of the figure which includes a Z-250 Light Rifle which also lights up.
You can purchase the figure direct from Bambaland via their website for $240 shipped or you can pre-order him from the usual on-line retailers.