The All Terrain MegaCaliber Six (AT-M6) Artillery Line is a collection of four All Terrain MegaCaliber Six (AT-M6) walkers, also known as the First Order Heavy Assault Walker, designed as mobile heavy artillery. Each AT-M6 moves on four legs, designed as a mobile heavy artillery walker that is much larger than the AT-AT walkers its design is based on. It is armed with a MegaCaliber Six turbolaser cannon on its back, along with 2 medium anti-ship laser cannons and 2 fire-linked heavy dual laser cannons for defense.