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The XXXG-01HD Gundam Derringer Arms is a Romefeller Foundation mass production Mobile Suit based on the XXXG-01H2 Gundam Heavyarms Kai. It appears solely in the semi-official one-issue comic New Mobile Report Gundam Wing Sidestory: Tiel's Impulse. Intended to operate within a set, small area, such as cities or bases, the design was refined to lessen its ranged combat abilities to save money. As a result, it features less weapons than its original counterpart as well as removing the blade antenna, lowering the overall range of its radar.

Technology & Combat Characteristics

Developed late in the Eve Wars, the Romefeller Foundation began development on a new series of mass production Gundams to revive their failing fortunes.Inspired by the XXXG-01H2 Gundam Heavyarms Kai, they produced a heavy assault Gundam dubbed Derringer Arms, named for the pocket pistol invented in the 19th century. As its name implies, Derringer Arms was intended to function in a smaller area, specifically to act as a guard for bases or cities. As a result, it lacks the distinctive V-fin antenna, shortening its radar range. Its main arsenal consisted of a handheld double Gatling gun, chest-mounted Gatling guns, homing missiles and micro-missiles, but less in number than its inspiration. This was due to the fact it was always intended to operate near a location where it could be resupplied quickly.


  • Gatling Gun

Like its inspiration, Derringer Arms mounts Gatling guns behind openable armor shutters on its chest. However, due to lack of data it is unknown if it possesses 2 Gatlings like the original Heavyarms or 4 like the upgraded Heavyarms Kai.

  • Micromissile Launcher

Derringer Arms mounts micromissile launchers in its shoulders, though it isn't known if it possesses the waist-mounted launchers seen on Gundam Heavyarms (EW).

  • Homing Missile Launcher

Like Gundam Heavyarms Custom (EW), Derringer Arms features homing missile pods on its lower legs.

  • Double Gatling Gun Derringer Arms carries one double-barreled Gatling gun like the Gundam Heavyarms Custom (EW) or the MMS-01 Serpent, though it's unknown if this version is still a solid bullet-firing weapon or a beam weapon.


With the end of the conflict, the mass-produced Derringer Arms units were never used. However, the following month, one unit was stolen by Trinoi Levinski, a former member of OZ's space force who was forced to retire after sustaining injuries to his left arm. Along with his friends Tiel and Krung Ponlamaai, Trinoi went to the shoal zone Graveyard of Soldiers in an attempt to locate Tiel's missing brother. When the trio finally reached the Graveyard of Soldiers, they encountered the Romafeller's pursuit force at least two times, Trinoi was able to destroy both enemy Gundams in the second battle, although his Gundam Derringer Arms explodes from sustained damage, at the cost of his own life.


Notes & Trivia

  • The name Derringer comes from the term meaning the smallest usable handgun for a caliber of ammunition.
  • The Derringer Arms model kit depicted in the Ultimate Playing Book consists of a Gundam Heavyarms Custom (EW) model with the forearms from either Vayeate or Mercurius.

External Links

Tiel's Impulse Mechanics
Mobile Weapon
Mobile Suit
XXXG-00W0S Wing Gundam Seraphim | XXXG-01HD Gundam Derringer Arms | XXXG-01ST T'ien-Lung Gundam
Romefeller Foundation
Mobile Weapon
Mobile Suit
XXXG-00W0L Gundam Lucifer | XXXG-00W0S Wing Gundam Seraphim | XXXG-01DG Gundam Deathscythe Guilty | XXXG-01DG2 Gundam Deathscythe Guilty Custom | XXXG-01HD Gundam Derringer Arms | XXXG-01SRL Gundam Sandleon | XXXG-01SRL2 Gundam Sandleon Custom | XXXG-01ST T'ien-Lung Gundam
Mariemaia Army
Mobile Weapon
Mobile Suit
XXXG-01ST T'ien-Lung Gundam
Mobile Doll
OZ-11MS Capricorn