From Halopedia, the Halo wiki
This article is about the post-Covenant War Mongoose, for other vehicles named "Mongoose", see Mongoose (fiction).
The M290 All-Terrain Vehicle (M290 ATV), commonly known simply as the Mongoose and sometimes dubbed the mothergoose, is the successor model of the M274 Mongoose all-terrain vehicle, manufactured by AMG Transport Dynamics primarily for service within the United Nations Space Command.
It is larger and has more armor than the older M274, in addition to featuring a rear-facing seat for passengers. Both the civilian and military versions are available with a variety of upgrade packages, including armored body panels, improved suspension systems, and alternate engines. The civilian version is not rated to carry Spartans without risking damage to the frame.
M290 Mongoose variants
M290-M Gungoose variants
All variants of the Gungoose in Halo 5: Guardians provide infinite frag grenades for the passenger, allowing them to be used for guarding chokepoints with great efficiency.
Halo 5: Guardians REQ cards
List of appearances