Master Jack Sword
- The Master Jack Sword is a weapon from the Transformers GT portion of the Generation 1 continuity family.

The Master Jack Sword (マスタージャッキソード Masutā Jakki Sōdo) is the mighty blade of GT-R Maximus. It is said to be powerful enough to cleave a planet in two, though being a staunch pacifist, Maximus does his best to avoid having to use it. Presumably, then, it sees more use in its other form, that of a car jack.
It has a silly name.
Fiction
Story of Transformers GT
Maximus's GT Sister, Hiiro, insisted on preparing the Master Jack Sword for him during the Transformers GT, but he refused to use it until he learned that GT-R Megatron was relying on brutish violence to get ahead in the race. Only then did he relent and unleash the sword for the purpose of taking Megatron down. A Biggest Sword! –The Last Resort–
Transformers GT: Mission GT-R story pages
When Unicron attacked the Transformers GT, Maximus put his pacifism aside and attacked him with the Master Jack Sword. Bringing Down the Sword
Toys
Transformers GT
- Included with GT-R Maximus, the Master Jack Sword is a hinged sword that can be used as either a weapon or a car jack.
Notes
- The Master Jack Sword is based on the Master Sword, Fortress Maximus's usual weapon in Japanese continuity.

