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The MSM-07E Z'Gok-E (aka MSM-07E Z'Gok Experiment) is an experimental amphibious mobile suit introduced in the Mobile Suit Gundam 0080: War in the Pocket OVA . The Z'Gok E was an experimental improved version of the MSM-07 Z'Gok. Besides improved beam cannons in its arm, allowing for rapid-fire, the original Z'Gok's head-mounted missile launchers were also replaced with torpedo launchers for additional firepower when operating underwater. To allow for better cruising range underwater, the suit's main propulsion systems were relocated from the back to the legs to create a more streamlined body shape. Its limbs were also designed to be retractable for the same reason. The thrusters built into its back were meant for jumping and various ground based movements, and greatly boost the suit's mobility on land. The Z'Gok E used a standardized cockpit with the introduction of the United Maintenance Plan, and was powered by an improved generator which gave the suit ample performance.

The MSM-10 Zock was one of Principality of Zeon's amphibious mobile suits developed during the One Year War. It was introduced in the anime Mobile Suit Gundam.

The MSN-00100 (MSN-100, MSN-001) Hyaku Shiki (百式, "Type 100") is a prototype Mobile Suit introduced in Mobile Suit Zeta Gundam and reappeared in the sequel Mobile Suit Gundam ZZ. It was primarily piloted by Quattro Bajeena during the Gryps Conflict and later by Beecha Oleg in the First Neo Zeon War. The Hyaku Shiki is a mobile suit built by Anaheim Electronics as part of the "Zeta Project". It was originally designed as the prototype transformable mobile suit, MSN-001 Delta Gundam which incorporated Anaheim Electronics' own "movable frame" technology and backpack-mounted wing binders for additional mobility. However, defects in the frame design led to problems in its transformation and the machine's development was soon abandoned.When the AEUG captured the Titans' RX-178 Gundam Mk-II, the movable frame technology of this newly acquired mobile suit assisted greatly in the advancement of the Zeta Project and also led to the redesigning of the Delta Gundam into the high performance, non-transformable Hyaku Shiki. Hyaku Shiki, which means 'Type 100' in Japanese, is named as such by its lead developer, Professor M.Nagano who hoped to create a mobile suit design that would endure for a hundred years. Because of the reliability of each device and its ease of access to the interior, the Hyaku Shiki was also used as a testbed for operational testing of various equipment under development.The Hyaku Shiki's gold colored appearance is due to the application of a beam-resistant coating on its armor, giving it some limited protection against beam attacks. The suit also has a unique sensor called the Image Directive Encode (IDE) system, which emits a red pattern when scanning or during precision aiming. It also retains several design features from the original Delta Gundam design, most notably the legs' front armor and backpack-mounted wing binders. The Delta Gundam's transformation capabilities later resurfaced in the MSN-001A1 Delta Plus.

The MSN-02 Zeong (ジオング Jiongu) is a prototype mobile suit appearing in the anime Mobile Suit Gundam. It was first piloted by the "Red Comet" Char Aznable. Developed by the Principality of Zeon at the A Baoa Qu space fortress during the One Year War, the Zeong was built exclusively for Newtype pilots. It initially had the model number "MS-16X" and was developed based on the data of multiple experimental units. The Zeong was also the first mobile suit to use the Psycommu system, which allowed a Newtype pilot to utilize its wire-guided remote-controlled forearms for all-range attack effectively. Each forearm was built with five mega particle cannons in its fingers. The Zeong also has three more mega particle cannons on its body, two in the waist and one in the head.The Zeong was expected to be around 35m tall when fully completed, making it much larger than most mobile suits of the time. Its large size was attributed to the difficulties in miniaturizing the Psycommu system. Though another account suggested that it was due to the need for larger generators to power its thirteen mega particle cannons. In the end, this mobile suit was only 80% complete when it was deployed, thus its lack of legs and exposed upper arms. Although the legs would aid in the AMBAC System, their omission did not hinder the Zeong from performing at 100% combat capacity, since two rocket thrusters were installed at where the legs were supposed to be.Although the Zeong was developed for Newtypes, it could also be operated by normal pilots. In this situation, the mobile suit would be controlled by a pilot in the torso cockpit and a gunner in the head cockpit. The two cockpits were connected by a traversal tube. In contrast, a single Newtype pilot could fully operate the Zeong from either one of the cockpits, though due to the mobile suit's prototype nature, its activation and initialization could only be done in the torso cockpit. In order to ensure the recovery of its data and pilot, especially if the pilot was a Newtype, the head also doubled as an escape pod and could detach from the main body when necessary.

The MSN-04 Sazabi is a mobile suit introduced in Mobile Suit Gundam: Char's Counterattack. It is piloted by Char Aznable. After Char Aznable returned as the leader of his own Neo Zeon faction in U.C. 0093, he ordered his engineers to create a new mobile suit which would fit his piloting skills and Newtype powers. The result was the MSN-04 Sazabi, which was later built by the Luna-based contractor Anaheim Electronics . With an overall height of 25.6 meters, the Sazabi is much bigger than most standard mobile suits, but thanks to the use of lightweight armor materials and a great number of thrusters it is much faster and maneuverable than other suits. The suit is armed with an abdomen-mounted scattering mega particle cannon, a beam shot rifle, a pair of beam sabers stored in the arms and a shield with three missiles as well as a beam tomahawk.Because Char is a Newtype, the Sazabi was also equipped with six funnels which the pilot could control through his psycowaves via a Psycommu system. The Sazabi was also the first MS to be equipped with the revolutionary new psycoframe cockpit. This system featured microscopic psycommu receiver circuits installed throughout a mobile suit's internal frame and cockpit walls. These tiny circuits amplify and transmit a Newtype pilot's psycowaves, enabling the mobile suit to respond instantaneously to mental commands.

The MSN-04 II Nightingale (MSN-04II ナイチンゲール?) is a mobile suit introduced in Mobile Suit Gundam: Char's Counterattack - Beltorchika's Children. It was piloted by Char Aznable during Char's Rebellion .The MSN-04 II Nightingale was developed exclusively for Char Aznable, the leader of Neo Zeon. its most prominent feature was the incorporation of a Psycho-Frame. As a result, the Nightingale was completed as a Mobile Sit (MS) with capabilities akin to a Mobile Armor (MA). The Nightingale was an MS with exceptional abilities and its silhouette greatly deviated from a human design, with overhanging binders on both shoulders, a large rear armor piece that extended backwards, and front armor as large as the legs. Despite its unconventional design., mobility devices placed on the shoulders and rear armor enabled the MS to gain high mobility and operability, and the five propellant tanks allowed for long combat operations. It was armed with a long-range, high-0power Large Mega Beam File, a Beam Tomahawk equipped with three devices, and 10 funnels. This armament configuration enabled the MS to gain combat abilities that could flexibly adapt to firefights, melee combat, and perform all-range attacks. The Nightingale was deployed during Char's Rebellion and overwhelmed Amuro Ray's RGZ-91 Re-GZ. It was as powerful as the RX-93-ν2 Hi-ν Gundam during the battle over Axis .

The MSN-06S Sinanju (aka Sinanju) is a mobile suit featured in the Mobile Suit Gundam Unicorn novel, its OVA adaptation and the television re-cut. A modified version of the MSN-06S Sinanju Stein, it was piloted by Full Frontal. Originally the MSN-06S Sinanju Stein developed by Anaheim Electronics as part of the Earth Federation's "UC Project", its movable frame is partly made from Psycho-Frame materials. This mobile suit was then stolen and modified into the MSN-06S Sinanju by the Neo Zeon remnant group known as "The Sleeves", and became the personal machine of the group's leader, Full Frontal.All of the Gundam-like features (except for the head-mounted vulcan guns) in the Sinanju Stein have been replaced with a Zeonic design and weaponry. Painted in crimson and with gold engraving, the Sinanju looks like the emblem of the Neo Zeon forces embodied. This decoration not only strengthens the armor, but is also said to be a design that is meant to control the organization known as the Neo Zeon remnants. The Sinanju Stein was an experimental machine, so there were some concerns about the armor's resistance to elasticity, but in order to increase the pilot's survival, the beam coating was strengthened from the two-layer structure used in most conventional MS to a five-layer structure, and the entire cockpit block was covered with Luna Titanium X material, and the Sinanju's armor has been strengthened as flagship machine.The Sinanju is also equipped with thrust deflector thrusters shaped like the large wings of a bird of prey, and flexible thrusters on the left and right sides of both legs and shins. Together with the numerous thrusters located all over its body, it is capable of acrobatic maneuvering combat that is impossible for a normal MS to achieve. With its overwhelming combat ability, crimson body, and mono-eye sensor, the Sinanju reminds all who see it of the legendary "Red Comet".

The MSN-06S-2 Sinanju Stein is a mobile suit from Mobile Suit Gundam Narrative and is piloted by Zoltan Akkanen. The MSN-06S Sinanju Stein was developed to test the durability and follow-up capabilities of the Psycho-Frame. Two units of the Mobile Suit, referred to using the development code "Stein 01", were later stolen by The Sleeves, remnants of Neo Zeon. One unit was remodeled as the MSN-06S Sinanju and used as the flagship MS of the organization. In UC 0097, the other unit was seen in the fight over the RX-0 Unicorn Gundam 03 Phenex and was embellished with the engravings that became root for the name of The Sleeves.

The NRX-044 Asshimar is a transformable mobile armor introduced in Mobile Suit Zeta Gundam. It was most notably piloted by Buran Blutarch. Initially developed as an experimental transformable mobile armor at the Oakland Research Institute, the Asshimar was introduced before the Gryps Conflict and was used extensively by the Earth Federation Forces. It was the first mobile weapon to be able to fly in the Earth atmosphere on its own power without the help of a sub-flight system. Asshimar's development was initiated by the Earth Federation Forces as the NRX-044[R] Prototype Asshimar TR-3 [Kehaar] and later continued in form of the NRX-044 Prototype Asshimar TR-3 [Kehaar].Asshimar's design featured additional sub mono-eye sensors along with the main camera sensor. Because its range was restricted to within the Earth atmosphere, a thermonuclear jet engine is used as its main propulsion system. This system uses air for propellant, making it fuel-efficient while effectively giving the Asshimar an enhanced cruising capacity. The engine air intakes are located in the upper thighs of the leg units, which are mainly closed by shutters in its mobile suit mode. In addition, its mobile armor mode possesses excellent aerodynamics as a lifting body, allowing for long-haul flights. The head unit is equipped with a multiple antennas with differential pressure sensors. Its landing gear, which is provided in the chest armor and leg units, is used in conjunction with underside fuselage nozzles for hovering during take-off.While not as powerful as its prototype, the production model of the Asshimar was a formidable machine. With magnet coating technology being applied to its transformation system, the Asshimar was able to transform between its MS and MA modes in only 0.5 seconds. Also, it sported thick armor and was able to withstand most standard mobile suit firearms. However, the chest frame is left vulnerable to attack during transformation. The Asshimar was limited to fielding its custom large beam rifle which was mounted on the main body in MA mode, limiting its usefulness. Nevertheless the Asshimar proved to be a powerful, versatile, and deadly unit and was stationed on various Federation bases on Earth.In the manga Mobile Suit Zeta Gundam Define, it was redesigned by Kyoshi Takigawa. New features include an increase in height, folding wings on the legs, retractable twin machine guns in both forearms, and built-in missile racks on both shoulders. In addition, the large beam rifle was now stored on the side in MA mode (allowing two to be mounted), and mounted on the forearm in MS mode when not in use.

The ORX-005 Gaplant TR-5 [Hrairoo] is a prototype transformable mobile armor, it is a variant of the ORX-005 Gaplant TR-5. The unit is featured in the photo-novel Advance of Zeta: The Flag of Titans. One problem with the standard ORX-005 Gaplant is the intense G-force produced by the movable shield binders, making it best used with a Newtype pilot. Due to this, when it was first produced, the ORX-005 Gaplant TR-5, it was instead mounted with booster shields used by TR-1 Hazel. Aside from this, a few changes were applied during the TR-5's initial service, such as applying an enhanced sensor unit and V-fin onto the head sensor, and replacing the main engines in the backpack with a thermonuclear hybrid jet-rocket engine, as with other machines of the TR series. For its main armament, the TR-5 carries a long blade rifle, which is mounted on the underside of the machine in mobile armor form.Later on, near the end of Gryps conflict, the TR-5 Hrairoo is further refined as an Area Dominance Mobile Armor, similar in purpose to RX-78GP03 Gundam "Dendrobium", but for all three major environment (atmosphere, ground, space). The booster shields were changed back to the moveable shield binders. The side armor and back armor have additional thrusters and armor mounted onto it, greatly increasing its maneuverability and defense; the back waist armor also comes with a moveable hardpoint, allowing it to mount an additional manipulator arm. The front waist armor is also enhanced, and thus now has spray beam emitters for defense, as well as two hidden arms underneath. The long blade rifle is upgraded to be able to equip 2 booster-type shields, which further increase its mobility (standard booster shields), attack power (micro missiles shields), or defense (spray beam shield).Furthermore, it can be equipped with the Hrududu II support unit. The shoulders mount booster-equipped claw units with beam emitters that can connect to the long blade rifle to form a very powerful beam cannon. With the Hrududu II, Gaplant gains four more hard points, allowing it to mount additional manipulator arms, shield units, and eventhe arms of the Psyco Gundam.

The PMX-003 The-O is a mobile suit from the series Mobile Suit Zeta Gundam and is piloted by Paptimus Scirocco. The fourth of five mobile suits built by the Newtype Paptimus Scirocco on the Jupitris, the PMX-003 The-O is Scirocco’s personal mobile suit, and perhaps the most powerful. It has an independently developed control system to take advantage of his rare spatial recognition abilities, and its control interface is specifically tuned for Scirocco's use, making The-O impossible to pilot except by Scirocco himself. The generator output specifications are modest at less than 2,000Kw; however, The-O is equipped with a large-scale thermonuclear reactor comparable to that of a warship.The-O has very thick armor that can withstand direct beam hits, such as from the AMX-004 Qubeley's funnels. Although very bulky and heavy, it is outfitted with enough thrusters to maneuver and move at very high speeds, demonstrating powerful thrust similar to mobile armors. It is also extremely agile despite its massive frame, with performance that greatly surpasses common MS and displaying tremendous space combat capabilities. By taking advantage of The-O's large size, it is possible to load large amounts of propellant into various parts of the body and the skirt armor to extend operation time. The leg and armor units incorporate a complex multi-joint structure that allow a high degree of freedom of movement. These parts significantly differ from those found in typical mobile suits.In terms of weapons, The-O is only equipped with four beam swords and a beam rifle. However, thanks to its unique sub-arms, The-O can wield all four swords at once, something that no other mobile suit could do, allowing The-O to excel at close quarters combat. The-O is a robust machine designed with emphasis on mobility instead of excessive firepower, and features an excellent interface that reflects the skill of the pilot.The last special feature of The-O is the Bio-Sensor (no relation to the device installed in the MSZ-006 Zeta Gundam), which functions like a psycommu system and allows Scirocco to more easily interface with his suit.

The RGC-83 GM Cannon II is a mobile suit introduced in the OVA Mobile Suit Gundam 0083: Stardust Memory. The successor of the RGC-80 GM Cannon, a medium-range support mobile suit developed in the late stage of the One Year War, the RGC-83 GM Cannon II was based on the RX-77D Guncannon Mass Production Type and inherited the Chobam Armor concept of the RX-78NT-1 Gundam NT-1. It was the culmination of the Federation's artillery support mobile suit development.Thanks to improvement in technology and productivity, the GM Cannon II was installed with a powerful generator, allowing it to be equipped with two shoulder-mounted beam cannons. This made it the first mass production unit to have high-powered beam cannons. These beam cannons were usually powered by the generator itself, but could also be powered by the two Energy CAP mounted on its backpack. A sighting device located on the pilot seat's headrest can be used to aim the beam cannons. For precision shooting under gravity, the stabilized gear on the waist could be deployed to stabilize the machine.The GM Cannon II's other weapons included a pair of head-mounted 60mm vulcan guns, a shortened beam saber stored in the left forearm, and the same GM Rifle and shield used by the RGM-79N GM Custom. Due to its role as a fire support mobile suit, the beam saber was only meant for close-quarters self-defense and it rarely had the chance to use it. The GM Cannon II also has relatively poor mobility due to the mass of its weapons and armor.The design of the GM Cannon II's basic components prioritized parts interchangeability with GM type mobile suits. Parts of its exterior was covered in composite armor, similar to the Chobam Armor used by the RX-78NT-1 "Alex". This composite armor improved bullet resistance while keeping the mobile suit's weight down. Unlike the Alex's Chobam Armor, the composite armor was built directly onto the frame and could not be purged when damaged. Despite their structural differences to Alex's armor, the composite armor was often referred to as "Chobam Armor" for convenience.Like the GM Custom, there was a plan to mass produce the GM Cannon II, but due to issues such as cost and the fact that the machine was meant to operate alongside the GM Custom, only a few units were actually deployed. After the Delaz Conflict, the project itself, including its development staff, was placed under the control of the Titans. The GM Cannon II's production was halted and a direct successor to it was never developed.

The RGM-79 GM (aka GM, pronounced Jim) was the first mass-produced mobile suit of the Earth Federation. It first appears in Mobile Suit Gundam. The RGM-79 GM is a mass-produced mobile suit based on the RX-78-2 Gundam. Its basic frame is easily adaptable to modifications into mission specific GM models, and has a fairly high level of mobility, for the time, both on Earth and in space. It has a maximum acceleration of 0.94 Gs in space, which is better than the Gundam's and roughly twice of the Zaku's. On Earth's surface, the GM is also faster than the Zaku II. The armor of the GM uses Titanium Alloy, a sturdy metal that could be refined more quickly and easily than the Gundam's Luna Titanium Alloy. Although titanium alloy is less durable than luna titanium, it is also slightly lighter which reduces the GM's overall mass compared to the Gundam's and is still superior to the Zaku II's super-high tensile steel armor.The GM was primarily armed with a beam spray gun, a less powerful version of the Gundam's beam rifle but could still destroy MS in one shot. Early in production, the beam spray gun had yet to be mass-produced so most GMs were equipped with various machine guns. These machine guns continued to be used by the GMs later, and the machine could also use the Gundam's beam rifle when required. It could also use a mass production version of the Gundam's Hyper Bazooka for heavier firepower. For close combat, the GM has a beam saber, and a shield similar to the one used by the Gundam. Commander units sometimes featured a second beam saber. Lastly, the GM has a pair of head-mounted 60mm vulcan guns for intercepting missiles, small vehicles or to stop enemy MS from closing in. From the GM started the RGM series that remained the mainstay of the Federation's mass production mobile suits until the end of the Federation itself.

The RGM-79C GM Type C (also known as GM Kai and GM Late Type) is a mass production mobile suit based on the RGM-79[E] GM Early Type. It was introduced in the OVA Mobile Suit Gundam 0083: Stardust Memory. Based on the late production type of the RGM-79 GM, the GM Type C features improved generator output and incorporates several new technology, such as sensor and devices from the GM D type and G type. Its various components were all designed to maximize reliability, ease of production, ease of maintenance, and ease of modification. It was intended to achieve the goals originally set by Operation V.

The High Grade Universal Century (HGUC) RGM-79D GM Cold Districts Type is a 1/144 scale kit released in 2003.

The RGM-79FP GM Striker is a ground close combat mobile suit and variation of the RGM-79C GM Type C. It was featured in the original design series Harmony of Gundam, the manga series Mobile Suit Gundam - Acguy: 2250 Miles Across North America, as well as the manga series Mobile Suit Gundam: We're Federation Hooligans!! and its sequel manga series Mobile Suit Gundam Katana. From the data collected by the RX-78-2 Gundam and the RX-79［G］ Gundam Ground Type, the Earth Federation Forces recognized the frequent occurrence of close combat during mobile suit battles, as well as the effectiveness of the Principality of Zeon's close combat-specialized mobile suit, the MS-07B Gouf. It was decided that the RGM-79C GM Type C, one of the general performance improvement variants of the RGM-79 GM still in development, would serve as the basis of a specialized close combat GM variant.The GM Striker was equipped with a set of full body additional armor known as Wearable Armor, based on the reactive armor used by the RGM-79F Desert GM as well as existing research on Chobam Armor, designed to protect the mobile suit from the ballistic weapons used by Zeon mobile suits. It was also fitted with a high-thrust backpack and improved leg thrusters. Weapons wise, it is equipped with one to two Beam Sabers, two Vulcan Guns, a 100mm Machine Gun, as well as an experimental Twin Beam Spear, a weapons with twice the firepower and reach of the beam saber. Finally, it has a Spike Shield, which can serve as a striking weapon in addition to defense.

The RGM-79G GM Command is a mobile suit that first appeared in the OVA Mobile Suit Gundam 0080: War in the Pocket. Following the success of the RGM-79D GM Cold Districts Type, a late production type GM deployed in the One Year War, development of new localized warfare machines using the suit as a basis started. The basic concept is to maintain the fundamental design of the GM Cold Districts Type while improving on its output and mobility. Demands of MS pilots who were unsatisfied with the original RGM-79 GM's performance were also taken into account, and with the upcoming counter offensive in space against the Principality of Zeon in mind, a decision was made to simultaneously developed a ground use unit and a space use unit. The end results were the ground use GM Command, and the space use RGM-79GS GM Command Space Type. Both suits were also used to collect data for the development of next generation mass production models.The GM Command is also called the "Colony Type" as it specialized in defending bases in space colonies and surrounding areas. For this reason, its output and weaponry were adjusted to reduce fatal damage to the colony's structure and walls. Specifications wise, the GM Command series is said to be a match for the Zeon's MS-14A Gelgoog, but as many of the machines were deployed to areas outside of the main battlefield that had low urgency, its functions were often suppressed and it could not display its full potential. To improve on the GM Cold Districts Type’s mobility, the GM Command series’ thrusters are distributed all over its body. Furthermore, the backpack, which contains the main propulsion system, was also boldly redesigned and optimized separately for the GM Command and GM Command Space Type. The placements of the thruster verniers on the GM Command's backpack are optimized based on simulations of operation within colonies, and they are pointed downwards for movements under gravity. Various sensors are also added to the backpack, replacing the normal GM's backpack beam saber rack.With the GM Command series use of a generator with higher output, intakes and ducts are also added to enhance cooling functions. This higher output generator is however a double-edged sword. Although it allows for full-scale operation of equipment like beam gun and beam rifle, such generators at that time could only be manufactured in zero gravity facilities, so mass production of the suit then at the Earth Federation Forces’ largest production facility at Jaburo was not possible. This had a negative impact on the suit's production number during the war.Due to the accumulation of manufacturing and designing knowledge, the GM Command series' maintainability and operability was greatly improved compared to the very first mass production models that had inconsistent standards. Unlike the normal GM, the GM Command series has additional sensors in the head such as environment monitoring sensors to thoroughly detect human presence/survivability, and this boosts the suit's anti-personnel and anti-material evasive capabilities. The GM Command series is also the first in the GM series to utilize mono-eye camera in the head to improve producibility. Communication capabilities are enhanced via the shoulder antenna, which also helps to prevent interferences or jamming caused by frequency bands used by civilians inside and outside of colonies. It was relatively easy to change the GM Command series' armor, backpack, and other parts; furthermore, its specifications can also be changed with little modification to the base structures. The suit served as the base for the RGM-79SP GM Sniper II.As the GM Command series was deployed as replenishment units during the war, only a small number were produced. Assignment of the machine to experienced MS pilots was prioritized, and as these pilots were often appointed as commanders of newly formed MS platoon, the GM Command series also gained a reputation as a 'Commander Use Unit' even though it was not specifically built for commanders. There were also cases where the suit was supplied on a platoon scale, leading to a considerable number of operational units in total.

The RGM-79[G] GM Ground Type is a ground based predecessor to the RGM-79 GM. It first appeared in Mobile Suit Gundam: The 08th MS Team. An early prototype of the Earth Federation Forces' mobile suit mass production project, the GM Ground Type was developed before the RX-78-2 Gundam's operational data was recovered. Even though it was only able to operate on Earth, its internal parts were all tuned for ground combat, and it was equipped with Luna Titanium armor, causing its mobility, maneuverability, and general performance to surpass the later RGM-79 GM.It is said that its performance under gravity even rivals that of the RX-78.The GM Ground Type was a simplified version of the RX-79[G] Gundam Ground Type, and produced using the same production line.Compared to the Gundam Ground Type, the GM Ground Type omitted the chest-mounted Vulcan gun and multi-launcher, the weapon container mount on the backpack, and was equipped with a less powerful generator.It also did not incorporate parts from the RX-78 series, though its head unit was similar in specs to that of the RX-78's.Since it was produced after the production format was established, its ease of production, ease of maintenance and availability of parts were all greater than its predecessor.Due to its use of Luna Titanium alloy, it was unsuited for mass production and produced in limited numbers. However, the GM Ground Type was important in establishing the EFF's mobile suit production framework. The operational data it collected contributed to the development of later mobile suits.Finally, the basic structure of its head was later inherited by the RGM-79 GM, becoming the iconic face of Federation mass production mobile suits.

The RGM-79GS GM Command Space Type is a mobile suit introduced in the OVA Mobile Suit Gundam 0080: War in the Pocket. Following the success of the RGM-79D GM Cold Districts Type, a late production type GM deployed in the One Year War, development of new localized warfare machines using the suit as a basis started. The basic concept is to maintain the fundamental design of the GM Cold Districts Type while improving on its output and mobility. Demands of MS pilots who were unsatisfied with the original RGM-79 GM's performance were also taken into account, and with the upcoming counter offensive in space against the Principality of Zeon in mind, a decision was made to simultaneously developed a ground use unit and a space use unit. The end results were the space use GM Command Space Type, and the ground use RGM-79G GM Command. Both suits were also used to collect data for the development of next-generation mass production models.Specifications wise, the GM Command series is said to be a match for the Zeon's MS-14A Gelgoog, but as many of the machines were deployed to areas outside of the main battlefield that had low urgency, its functions were often suppressed and it could not display its full potential. To improve on the GM Cold Districts Type’s mobility, the GM Command series’ thrusters are distributed all over its body. Furthermore, the backpack, which contains the main propulsion system, was also boldly redesigned and optimized separately for the GM Command Space Type and GM Command. This difference in the backpack is the biggest characteristic that differentiates the two machines, and is related to the different gravitational environment that they operate in, 0G and 1G respectively. While the GM Command had downward-pointing thrusters concentrated on the bottom of the backpack, the GM Command Space Type's thrusters are spread around the backpack and faces various directions. The GM Command Space Type's thruster output is also boosted by 10%, has more apogee motors, as well as a greater propellant capacity for higher operating time.With the GM Command series use of a generator with higher output, intakes and ducts are also added to enhance cooling functions. This higher output generator is however a double-edged sword. Although it allows for full-scale operation of equipment like beam gun and beam rifle, such generators at that time could only be manufactured in zero gravity facilities, so mass production of the suit then at the Earth Federation Forces’ largest production facility at Jaburo was not possible. This had a negative impact on the suit's production number during the war.Due to the accumulation of manufacturing and designing knowledge, the GM Command series' maintainability and operability was greatly improved compared to the very first mass production models that had inconsistent standards. Unlike the normal GM, the GM Command series has additional sensors in the head such as environment monitoring sensors to thoroughly detect human presence/survivability, and this boosts the suit's anti-personnel and anti-material evasive capabilities. The GM Command series is also the first in the GM series to utilize the mono-eye camera in the head to improve producibility. Communication capabilities are enhanced via the shoulder antenna, which also helps to prevent interferences or jamming caused by frequency bands used by civilians inside and outside of colonies. It was relatively easy to change the GM Command series' armor, backpack, and other parts; furthermore, its specifications can also be changed with little modification to the base structures.As the GM Command series was deployed as replenishment units during the war, only a small number were produced. Assignment of the machine to experienced MS pilots was prioritized, and as these pilots were often appointed as commanders of newly formed MS platoon, the GM Command series also gained a reputation as a 'Commander Use Unit' even though it was not specifically built for commanders. There were also cases where the suit was supplied on a platoon scale, leading to a considerable number of operational units in total.

The RGM-79N GM Custom is a limited-production general-purpose mobile suit introduced in Mobile Suit Gundam 0083: Stardust Memory. Developed as part of the Federation Forces Reconstruction Project that began in U.C. 0081, the design of the RGM-79N GM Custom was based on the RGM-79SC GM Sniper Custom, the RGM-79G GM Command, the RGM-79GS GM Command Space Type, and the RX-78NT-1 Gundam NT-1. It was developed at Augusta Base and incorporated many parts that were developed for Gundam NT-1, which was originally considered for mass production. Because of this, the GM Custom's specifications were considered top class even among Augusta series mobile suits, which were already renowned for their high performance. Its thrust was almost twice that of previous GMs and its generator output rivalled Gundam type mobile suits, making it one of the Federation's highest performing mass production unit prior to the Delaz Conflict.Additionally, Magnet Coating was said to be applied to the shoulder and elbow joints to improve their flexibility. However, the GM Custom's specifications did not excel at any one aspect and was derided as "remarkable for being unremarkable" by some. Also, its high performance came at the price of high production cost. As a result, even though it was planned for mass production, only a small number of units were manufactured and assigned to ace pilots. Various aspects of these units, such as the trims of the sub thrusters, and the response and torque of the actuators in the four limbs, were adjusted to better suit their pilots. Following the end of the Delaz Conflict, the Titans took over the project and made some changes to the GM Custom's designs, creating the RGM-79Q GM Quel.