Model number: RX-75-4
Code name: Guntank
Unit type: prototype artillery mobile suit
Manufacturer: Earth Federation Forces "Project V"
Operator: Earth Federation Forces
Rollout: UC 0075
First deployment: September UC 0079
Accommodation: pilot/driver in standard cockpit in torso with Core Block System using FF-X7 Core Fighter; copilot/gunner in canopy-style cockpit in head
Dimensions: overall height 15.6 meters; head height 15.0 meters
Weight: empty 56.0 metric tons; max gross 80.0 metric tons
Armor materials: Luna Titanium alloy
Powerplant: Minovsky type ultracompact fusion reactor, output rated at 878 kW
Propulsion: engine-driven caterpillar treads: 2; rocket thrusters: 88000 kg total
Performance: maximum ground driving speed 110 km/h
Equipment and design features: sensors, range 6000 meters
Fixed armaments: 2 x 180mm cannon, fire-linked, 30 round magazine each, mounted over shoulders; 2 x quadruple bop missile launcher, mounted on arms
The first Earth Federation mobile suit developed under their top-secret "Project V," the RX-75 Guntank is hardly a mobile suit at all. Developed four years prior to the outbreak of the One Year War, the Guntank is nothing more than a fusion of a tank with the upper torso and arms of a mobile suit, and is originally intended to serve as an anti-MS unit when rumors of Zeon's first mobile suits reach the Federation. Despite this apparently faltering first step, the Guntank packs a serious punch as a heavy fire support and artillery unit. The Guntank is also somewhat unique in that its piloting and gunnery requirements are originally split up between two cockpits: a gunner's station in the head, and a standard cockpit in the torso. The Guntank, like its Project V brethren RX-77-2 Guncannon and RX-78-2 Gundam, features the Core Block System, which allows the Guntank's upper torso to be ejected to continue operating as a fixed gun emplacement while the torso pilot ejects the Core Block to keep fighting in a FF-X7 Core Fighter.
The first RX-75s are deployed for testing and trials at the Federation's research base on the Side 7 research colony. However, only one unit - the RX-75-4 - survives an attack when Project V is discovered by Zeon forces in September UC 0079. This last unit is transferred to the assault carrier White Base, where it operates as a support/defensive unit until it is decommissioned at the Federation's Jaburo military headquarters in November UC 0079. During its service aboard White Base, the Guntank is upgraded so that one pilot can handle both piloting and gunnery functions from the head cockpit. Impressed by the Guntank's performance, the Federation Forces put it into mass production, with some units seeing action in Southeast Asia. After the war, the Federation Forces roll out the RMV-1 Guntank II, which remains in service for at least two decades. Long after the One Year War, the Federation Forces develop several transforming mobile suits inspired by the Guntank: the D-50C Loto and F-50D Guntank R44.
Pilot(s): Ryu Jose, Hayato Kobayashi, Kai Shiden, Amuro Ray, Larry Radley
Appearances: Mobile Suit Gundam; Mobile Suit Gundam: Cross Dimension 0079; Mobile Suit Gundam: Lost War Chronicles; Mobile Suit Gundam: Federation VS Zeon DX; Mobile Suit Gundam: Journey to Jaburo; Mobile Suit Gundam: Encounters in Space; Gundam 0079: The War for Earth; Mobile Suit Gundam: Bonds of the Battlefield; Mobile Suit Gundam: Target in Sight; Mobile Suit Gundam: Pilot's Locus; Mobile Suit Gundam: Spirits of Zeon ~Dual Stars of Carnage~; Mobile Suit Gundam: Gundam Vs. Gundam; Mobile Suit Gundam: Gundam Vs. Gundam Next; Dynasty Warriors Gundam; Mobile Suit Gundam: Extreme Vs.; Mobile Suit Gundam Side Stories; Mobile Suit Gundam U.C. HARDGRAPH Iron Mustang; Mobile Suit Gundam Extreme Vs. Full Boost; Mobile Suit Gundam: Operation Troy (manga)
Original mechanical designer: Kunio Okawara