All Terrain MegaCaliber Six

The All Terrain MegaCaliber Six (AT-M6), also known as the Gorilla Walker or First Order Heavy Assault Walker, was a mobile heavy artillery walker used by the First Order during their war with the Resistance. Much larger than the All Terrain Armored Transport used by the Galactic Empire, it was the biggest walker in the First Order's arsenal and featured a MegaCaliber Six turbolaser cannon mounted to its back, for which it was named.

Behind the scenes
The All Terrain MegaCaliber Six was first officially revealed on The Star Wars Show on August 23, 2017, along side the First Order Dreadnought. It was created for the 2017 film Star Wars: Episode VIII The Last Jedi, directed by Rian Johnson, as the First Order variant of the All Terrain Armored Transport of the Galactic Empire, being larger and more stable.

A scale model of the All Terrain MegaCaliber Six, alongside several other models and props, were placed on display in the Star Wars Launch Bay attraction during the Galactic Nights event on December 16, 2017, as part of the promotion for the then-recently released movie Star Wars: Episode VIII The Last Jedi.

Appearances

 * Star Wars Battlefront II
 * Star Wars: Episode VIII The Last Jedi
 * Star Wars: The Last Jedi: Expanded Edition
 * Star Wars: The Last Jedi: A Junior Novel

Non-canon appearances

 * Star Tours: The Adventures Continue