In the customization aspect of "Front Mission", wanzers can be customized with a variety of parts, computers, auxiliary backpacks, and weapons. The player has full control over customizing their wanzers and can do so as long as its total weight value does not exceed its given power output. To field a wanzer in battle, it must have a complete frame of parts: body, left arm, right arm, and legs. Parts with built-in weapons in the body or arm sections can also be equipped on a wanzer. Computers improve the accuracy of the weapons equipped on the wanzer. Auxiliary backpacks and weapons are not mandatory equipment to use wanzers, but are crucial in order to progress through the video games. Auxiliary backpacks serve to give a wanzer special features during combat; they allow a wanzer to carry support items such as ammunition reloads and increase the power output of the unit, allowing it to carry heavier gear.