The M12G1 Light Anti-Armor Vehicle (M12G1 LAAV), commonly known as the Gauss Warthog, is a variant of the UNSC M12 Force Application Vehicle that features a mounted M68 ALIM Gauss Cannon. It is designed to quickly defeat lightly-armored vehicles such as Type-25 RAV Choppers and Type-32 RAV Ghosts. The M68 Gauss Cannon fires 25mm hypersonic speed projectiles by asynchronous magnetic acceleration in the base of the cannon and takes about a half a second to recharge between cannon shots.
- The gauss cannon is devastating to vehicles.
- The gauss cannon can kill Spartans and Elites in one shot.
- The medium rate-of-fire is fast enough to obtain multikills.
- The Gauss Warthog's armor is itself vulnerable to anti-vehicle weaponry.
Changes from Halo 2 to Halo 3 and Halo: ReachEdit
- Rate of fire of the cannon is decreased.
Changes from Halo 3 and Halo: Reach to Halo 4Edit
- Rate of fire of the cannon is decreased even further.
Changes from Halo 4 to Halo 2: Anniversary multiplayerEdit
- The gauss cannon now has a slight warmup time of about 0.5 seconds before it is able to fire. While it warms up, a laser pointer projects from the gauss cannon onto the target.
- Rate of fire of the gauss cannon is drastically increased.
Changes from Halo 2: Anniversary multiplayer to Halo 5: GuardiansEdit
- Gauss cannon no longer has a warm up time, and fires on trigger pull.
- Rate of fire of the cannon decreased back to how it was in Halo 4.
- Multiple variants of the Gauss Hog have been added for use in multiplayer.
Many variants of the Gauss Warthog have been produced over the model's lifetime.
- Main article: M12 Force Application Vehicle
|N/A||Spirit of Fire Gauss Warthog||The crew of the UNSC Spirit of Fire were known to a variant of Warthog decorated with a fire decal across the bonnet, dubbed the "Fireball Warthog."||
- Main article: M12B Force Application Vehicle
|N/A||CORP Gauss Warthog||A Gauss 'Hog variant with additional armour ostensibly used by Liang Dortmund to ward off large animals, although in reality it is often used against unruly crowds.||
|N/A||Tundra Gauss Warthog||Sporting arctic camouflage, the Tundra Gauss 'Hog features improved armor and is often used in remote locations as an anti-armor and anti-air vehicle.||
|N/A||Woodland Gauss Warthog||The Woodland Gauss Warthog is exceptional at eliminating Covenant Empire boosted gravity vehicles slowed by rugged terrain.||
|N/A||Urban Gauss Warthog||The Urban Gauss Warthog is an up-armoured Warthog deployed as an anti-tank unit, sporting urban camouflage.||
|N/A||ONI Gauss Warthog||An ONI-employed Gauss Warthog with a sleek black colour scheme, whose rounds cause lingering area-of-effect damage through a classified mechanism.||
- The Gauss Warthog first appeared in the E3 2000 Halo: Combat Evolved trailer. It was cut from the final game.
- A label on the Halo 4 Gauss Warthog reads, "BIG SCARY LASER. DO NOT LOOK INTO BEAM WITH REMAINING EYE." (The Spartan Laser also has this sticker.)
- In Halo 4 Title Update v1.04, the Gauss Warthog's auto aim, magnetism, and damage was reduced.