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 weapons with Legos (human and covenant), like the sniper rifle, SMG, beam rifle, energy sword, and shotgun.
Halo support weapons built with Legos:
*SRS99D-S2 AM Sniper Rifle (Sniper Rifle)
*Type-50 Sniper Rifle System (Beam Rifle)
*M7/Caseless Submachine Gun (SMG)
*Type-1 Energy Weapon/Sword (Energy Sword)
*M90 Close Assault Weapon System (Shotgun)