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RX-105 Ξ Gundam

Mafty's advanced Gundam with Minovsky Craft.
Jenxi Seow Published 7 Oct 2021 Updated 2 Jan 2025
RX-105 Ξ Gundam

The RX-105 Ξ Gundam (Xi Gundam) was a prototype mobile suit produced by Anaheim Electronics for the anti-Earth Federation organisation Mafty. The “R” in the model code meant it was a Federation model[foot]Federation in Japanese is renpou, hence the use of “R”.[/foot] and the “X” designated it as an experimental mobile suit. The “105” in the model number denoted that it was developed in UC 0105. The Greek letter Ξ (Xi) in the code name indicated it was part of Anaheim Electronics’ Zeta Project.

RX-105 Ξ Gundam from Gundam Fix Figuration front view
RX-105 Ξ Gundam from Gundam Fix Figuration front view
RX-105 Ξ Gundam from Gundam Fix Figuration rear view
RX-105 Ξ Gundam from Gundam Fix Figuration rear view

History

Anti-Earth Federation group Mafty tasked Anaheim Electronics with the creation of a prototype mobile suit to aid the group in its offensive against the Federation. The RX-105 Ξ Gundam was a fifth generation mobile suit developed along with the RX-104FF Penelope. As it started development later than the Penelope, Anaheim Electronics added more advanced technology in the Ξ Gundam.

Anaheim Electronics maintained anonymity by delivering Ξ Gundam in Cargo Pisa to low orbit. When Federation forces discovered the Mafty base in Davao, Mafty forces abandoned the base. Mafty Navue Erin travelled to low Earth orbit to retrieve the Ξ Gundam. While returning to Earth, he encountered the Penelope piloted by Lane Aim. After a brief engagement, he defeated the Penelope and regrouped with the Mafty forces.

RX-105 Ξ Gundam from Gundam SD G Generation front view
RX-105 Ξ Gundam from Gundam SD G Generation front view
RX-105 Ξ Gundam from Gundam SD G Generation rear view
RX-105 Ξ Gundam from Gundam SD G Generation rear view

Design

When Anaheim Electronics developed the RX-104FF Penelope for the Earth Federation, it also built the RX-105 Ξ Gundam and equipped it with more advanced technology.

The most notable design feature of the Ξ Gundam was the Minovsky Flight Unit mounted on its shoulders. The mobile suit could change into Flight Form that generated beam barriers to allow it to achieve supersonic flight in atmosphere. Top speeds of Mach 2 had been recorded.

The Ξ Gundam had an ultracompact Minovsky power plant that generated an output of 3,980 kW. It had an array of rocket thrusters that generated 160,000 kg of thrust.

The mobile suit had a standard cockpit in its torso with a panoramic monitor and linear seat.

RX-105 Ξ Gundam linear seat
RX-105 Ξ Gundam linear seat
RX-105 Ξ Gundam cockpit
RX-105 Ξ Gundam cockpit
RX-105 Ξ Gundam controls
RX-105 Ξ Gundam controls
RX-105 Ξ Gundam front view
RX-105 Ξ Gundam front view
RX-105 Ξ Gundam rear view
RX-105 Ξ Gundam rear view
RX-105 Ξ Gundam flight mode bottom
RX-105 Ξ Gundam flight mode bottom
RX-105 Ξ Gundam flight mode top
RX-105 Ξ Gundam flight mode top

Armament

The Ξ Gundam’s standard weapons were a beam rifle for ranged attacks, and beam sabers for melee combat. The mobile suit also fielded a blend of additional ranged and close-quarters weaponry to exploit its Minovsky-flight agility, combining heavy beam ordnance with Psycommu-guided funnel missiles.

RX-105 Ξ Gundam equipment index in MSG Hathaway
RX-105 Ξ Gundam equipment index in MSG Hathaway

Beam rifle

The beam rifle served as the Ξ Gundam’s primary ranged weapon, boasting an initial velocity nearly double that of earlier Federation rifles.

RX-105 Ξ Gundam beam rifle
RX-105 Ξ Gundam beam rifle

The rifle drew its shots from energy packs (E-packs), cartridges of charged Minovsky particles. By breaking down matter at a molecular level, each bolt could pierce heavy armour, enabling one-shot destructions of mobile suits. The same E-pack standard supported newer units such as the RGM-89 Jegan Type-A.

Vulcan guns

Fire-linked Gatling vulcans were mounted on either side of the Ξ Gundam’s head. They provided anti-missile defence and proved useful for suppressing lightly armoured support craft or finishing damaged mobile suits at close range.

Beam sabers

The Ξ Gundam carried two beam sabers for melee combat. They were docked in the recharge racks on the shoulders when not in use. The beam sabers could generate beam blades on both ends, similar to the ones used by the RX-93 ν Gundam (Nu Gundam).

The beam sabers used an I-field to contain Minovsky particles within the shape of a blade. Minovsky particles broke down matter at a molecular level. This meant that the beam saber could cut through almost any material.

Minovsky particles were channelled into the saber through an E-cap attached to its hilt. The E-cap recharged with Minvosky particles from the mobile suit’s reactor when the saber was stored in the recharge dock.

Shield

The mobile suit mounted a shield on its left arm for defence. It was able to withstand high-powered beam attacks. The shield had a beam cannon in its tip, giving it extra firepower and combat options.

RX-105 Ξ Gundam shield
RX-105 Ξ Gundam shield

Triple missile launcher

The Ξ Gundam had a triple missile launcher in both forearms and knees. Each launcher carried 7 rounds, bringing the total loadout to 84 missiles.

RX-105 Ξ Gundam missile forearm triple missile launcher
RX-105 Ξ Gundam missile forearm triple missile launcher

Funnel missiles

Ten funnel missiles mounted on the rear skirt armor offered limited-range Psycommu guidance, allowing the Ξ Gundam to pursue targets even within dense Minovsky particle storms.

RX-105 Ξ Gundam missile funnel stored
RX-105 Ξ Gundam missile funnel stored
RX-105 Ξ Gundam missile funnel
RX-105 Ξ Gundam missile funnel

Known pilots

Variants

No known variants.

RX-105 Ξ Gundam novel
RX-105 Ξ Gundam novel
RX-105 Ξ Gundam lineart
RX-105 Ξ Gundam lineart

Behind the scenes

Katoki Hajime and Nakatani Seiichi created the original mechanical designs, while Morik Yasuhiro provided the depiction seen in the Hathaway’s Flash novel.

RX-105 Ξ Gundam designs
RX-105 Ξ Gundam designs

Gunpla

Bandai has released the 1/144 HGUC Xi Gundam in April 2021 and a special HGUC Xi Gundam vs Penelope funnel missile effect set featuring the battle between the two Gundams.

Buying through our links helps us earn a commission to keep the site alive.

HGUC 1/144 RX-105 Xi Gundam
HGUC 1/144 RX-105 Xi Gundam
HGUC 1/144 Xi Gundam vs Penelope Funnel Missile Effect Set
HGUC 1/144 Xi Gundam vs Penelope Funnel Missile Effect Set

Appearances

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