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The XXXG-01H Gundam Heavyarms (aka Heavyarms or Gundam Zero-Three) is a mobile suit from the TV anime Mobile Suit Gundam Wing. It was the third of Operation Meteor's five Gundams, and was piloted by a young man operating under the pseudonym Trowa Barton.

Technology & Combat Characteristics

Created by Gundam Scientist Doktor S, the Heavyarms was developed in the L3 Colonies under the financial support of the Barton Foundation. The Heavyarms is a long-range attack unit with a variety of built-in firearms. Its design is a combination of the firepower aspect of the Wing Gundam Zero with an emphasis on overwhelming suppressive fire. Its overall firepower is comparable to 3 to 5 battleships', but its attack power drops drastically once it run out of ammunition. However, with the skilled circus performer Trowa's excellent piloting sense, the Heavyarms is capable of acrobatic melee combat.


  • Vulcan Gun
A pair of shell-firing armament built into the head. Low offensive power, only used to restrict enemy movement, and lay down a wall of suppressive fire due to their rapid fire capability.
  • Machine Cannon
Mounted on the clavicle section of the Heavyarms, the pair of Machine Cannons have stronger firepower than the vulcan guns.
  • Chest Gatling Gun
A pair of Gatling Guns mounted in the left and right chest, they are hidden by openable armor covers. They can be fired together with the Machine Cannons and Vulcan Guns to restrict enemy units from closing in.
  • Homing Missile
Six Homing Sissiles are stored within the shoulders of the Heavyarms, they are fired at the enemies with a lock-on. The EW (Endless Waltz) version features more of these missiles (44) and they are stored in the front skirts and missile pods mounted on the legs.
  • Micro Missile
Two pods each containing twelve Micro Missiles are mounted on the legs of the Heavyarms. The EW version features more of these missiles (52) and they are stored within the shoulders and the side skirts.
  • Beam Gatling
A high output beam weapon that serves as the Heavyarms' main armament, it is worn over the left forearm and can be used for defense as it is equipped with a shield. A foldable foregrip can be attached to allow the weapon to be supported by the right arm. It is mounted on the backpack when not in use. The Beam Gatling's added weight can cause the Heavyarms to tilt to the left when in use. To reduce the weight, the left forearm can be removed and the Beam Gatling attached directly onto the left elbow. This was only done once when Trowa adjusted the Heavyarms for Heero's rematch with Zechs. In the EW version, this beam weapon is handheld, and connected via a cable to an energy tank mounted on the suit's back. The attached shield is optional and can be mounted on one of the suit's forearms.
  • Army Knife
A knife made of Gundanium alloy and fixed to the right arm, it flips forward when in use. Despite its small size limiting its reach, it has no problem slicing apart enemy mobile suits.
  • Beam Saber
For Heero's rematch with Zechs, Trowa not only removed the left forearm and attached the Beam Gatling directly to the left elbow, he also stored a Beam Saber in a part of the internal connection linking the gatling to the elbow. This weapon was presumably borrowed from the Wing Gundam, having the same green beam blade. When the Beam Gatling is out of ammo, it is jettisoned, revealing the Beam Saber stored within, which is then wielded by the right hand. After the battle, this weapon was not seen again, implying Trowa had restored the Heavyarms' left arm to its original state.
  • Igel Unit
Debuting in the "Glory of the Losers" manga, this set of extra weapons for the EW version was used when attacking the Corsica Base. It also has leg-mounted crawler units for high-speed ground movement to compensate for the drop in mobility due to the increase in weight caused by the added weaponry. All added weaponry can be ejected instantly via explosive bolts.
  • Large Missile Pod
Each shoulder is additionally equipped with twelve container blocks that have four missiles in each block. They can be used to attack in all directions as their launch ports not only face the front, but also to the sides and rear.
  • Additional Leg Missile Pod
A side-facing missile pod containing 20 missiles is attached externally to each leg's micro missile pods.
  • Large Beam Cannon
A powerful beam weapon externally mounted to a trailer, it can destroy multiple enemy machines with a single shot. However, it can only be fired once as the weapon's weak barrel cannot withstand its power.

Special Equipment & Features

  • Damselfly
Used only by the EW version, it is an atmospheric flight unit equipped with 6 prop rotors and 2 auxiliary jet engines. Since it is mounted in the center of the backpack, it does not interfere with the beam gatling or energy tank. Because it is top-heavy, the support leg in the center of the equipment is extended to support the Heavyarms when landing.
  • Self-Destruct System
The Heavyarms was built to self-destruct should the pilot choose to. A remote detonator is placed within the cockpit and if a dire situation arrives, the pilot can destroy the Mobile Suit. The system was designed to overload its power systems and has enough explosive power to destroy several city blocks. It's a last option tactic if the pilot is incapable of protecting the Mobile Suit, while not allowing it to fall into enemy hands. It also can be used as one large explosive device to eradicate large targets.


With financial backing from the Barton Foundation, Gundam Heavyarms was designed for use in the first Operation Meteor plan which involved a colony drop and subsequent "extinction level event" on Earth. Gundam Heavyarms, along with its four companion Mobile Suits, was to be used to control the ensuing chaos. Gundam Heavyarms was to be piloted by the son of the head of the Barton Security Group, Trowa Barton.

The Gundam design teams, however, did not want their creations used as weapons of mass murder and decided to wage the war for colony independence in their own way. Coming up with a new plan for Operation Meteor, the original Trowa Barton was killed, and an anonymous young mobile suit mechanic took over as the pilot of the Gundam Heavyarms, adopting the name of its former pilot.

As Operation Meteor escalated into a full-fledged war between OZ and the five Gundams, it became clear that the battle would eventually move to space. Trowa then left the ground-use Gundam Heavyarms hidden on Earth as he headed back to space. Sally Po eventually discovered the abandoned Heavyarms and brought it to space, accompanied by Heero Yuy and his Wing Gundam Zero. After meeting up with the remaining Gundam pilots aboard the Peacemillion, Howard and his crew upgraded the Gundam Heavyarms into the Gundam Heavyarms Kai for Trowa's use.






Illustrations & Artwork



Action Figures

Notes & Trivia

  • The first design of Gundam Heavyarms follows the nationality trend from Mobile Fighter G Gundam. The Gundam Heavyarms design was intended to be American with clown motifs. Some of the latter draft designs also have its Beam Gatling mounted behind its left shoulder.
  • In the manga adaptation, the Heavyarms was involved in the battle at Sanc Kingdom and was equipped with backpack-mounted beam cannons and a bazooka-like handheld weapon. It was also never modified into Heavyarms Kai after it was recovered. Instead, it was equipped with a backpack-mounted beam cannon and an arm-mounted missile launcher until the end of the story.
  • Katoki's EW redesign initially changed the handheld Beam Gatling to a shell firing weapon. This change was later reverted in the Mobile Suit Gundam Wing Endless Waltz: Glory of the Losers manga as well as the MG model kit.
    • The first iteration of the EW version of Heavyarms also lacked the army knife. The weapon was restored when the MG model kit was released, as an optional accessory. In the Gundam Wing Endless Waltz: Glory of the Losers manga, the Heavyarms' army knife is fixed on the right forearm like the TV version.
  • Of the five Operation Meteor Gundams, Heavyarms is the only one that was never damaged badly enough to be disabled or captured.


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