Gran Arm
- Gran Arm is an Autobot Micromaster from the Operation Combination portion of the Generation 1 continuity family.

Gran Arm (グランアーム Guran Āmu) is the comedian of the Build Team, even going so far as to appear on human television shows with Digger for publicity stunts. He's not as physically strong as his teammates, but his incredible armor and tight-turning vehicle mode compensate for this shortcoming.
He also has an evil counterpart running around.
Fiction
Micromaster Collection

Gran Arm was one of several Cyberdroids in stasis at the Autobot Micromasters' Earth base. During a particularly pitched battle with the Decepticon Sixwing in Berserker Mode, the capsules containing the Build Team took a shock, activating them. A little while later, Micromasters resembling the Build Team were spotted wrecking human construction sites. The Build Team soon confronted them in Sixbuilder mode... only for the impostors to do the same! The green Decepticon Sixbuilder announced that the two teams were actually halves of the original whole, and that he would rejoin with Sixbuilder only after all the other Autobots had been destroyed. Sixbuilder – Warrior of Misfortune!?
Later, after Sixtrain beat back the Decepticons at an excavation site by a dormant volcano, the Build Team began their own investigation, wondering what the Decepticons were digging up. Gran Arm's grumbling was interrupted when Raise discovered two pieces of Cybertronian metal, one of which bore a strange purple insignia. Realizing something incredibly important was buried there, but not sure what, the Autobots built their new Metrobase headquarters there to protect it from the Decepticons. Sixtrain! Activate Red Mode!!
Operation Combination story pages
Years later, Gran Arm and the rest of the Six-team Micromasters joined Guard City and the Road Corps in defending Earth from the forces of the Decepticon Führer Scrash. Operation Combination
Toys
Operation: Combination

- Sixbuilder (Micromaster, 1992)
- Japanese ID number: TF-01
- The original version of Gran Arm was available only as part of a Sixbuilder gift set in Japan. Aside from the payloader mode, Gran Arm can form the chest or back of any of the Six-Teams, though his nominal placement is as Sixbuilder's chest. The original Six-Teams are considered among the more difficult Japanese Generation 1 pieces to find.
- This mold was used to make the Universe Micromaster Buckethead, and the evil half of Gran Arm.
Micromaster Collection

- Gran Arm (Micromaster, 2003)
- Sixbuilder ID number: 4
- Accessories: Sixbuilder torso & head
- In 2003, the entire Sixbuilder team was re-released as part of the "Micromaster Collection", in individual boxes with a number visible to show which mold was inside each box. For this release, the team was extensively redecoed; Gran Arm went from red to orange-yellow. All decals were also replaced with paint applications.
Notes
- Gran Arm, like all of the six-team Micromasters, had no individual bio information whatsoever until his Micromaster Collection release a decade after his original Operation Combination release.


