If you're into Halo 3 and you're into Legos, why not combine the two? Watch this video tutorial to learn how to build Halo 3 heavy weapons with Legos (human and covenant), like the missile pod, machine gun turret, and the flamethrower.
Halo support weapons built with Legos:
*LAU-65D/SGM-151 (Missile Pod)
*AIE-486H Heavy Machine Gun (Machine Gun Turret)
*M7057/Defoliant Projector (Flamethrower)