While the Halo license for building bricks is, unfortunately, in the hands of Mega Bloks at the moment, that doesn’t mean that Halo and LEGO fans haven’t been building iconic creations from the series in the superior brand. Proving that point today is Velocites with the HRUNTING/YGGDRASIL Mark IX Armor Defense System… or UNSC Mantis to save time. While it uses only official pieces (save for the bullet chain), this isn’t a purist build as the military olive colour here is done with paint.
In the interest of comparison, here is the Mega Bloks Mantis. For a $33 set, we must admit that Mega Bloks actually did a good job, but this LEGO version blows it out of the water.