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The MAM-07-X3 Grublo Underwater Bit-Mounted Prototype is a variant of the MAM-07 Grublo. It first appeared as a part of the MSV-R line.

Technology & Combat Characteristics

The Grublo Underwater Bit-Mounted Prototype is a standard MAM-07 Grublo retrofitted with a Psycommu system and a sonar dome attached underneath. It is a type of Quasi-Psycommu system that allows normal pilots to operate the MAM-07-X3. The rear fuselage is equipped with complex transmission units to control the bits. The claw arms are replaced with underwater-use bits.


  • 7-tube Torpedo Launcher
To combat enemy's naval assets and aquatic MS, the Grublo relies mainly on a pair of 7-tube torpedo launcher mounted on its main body. Each tube carries 3 projectiles, which bring a total of 42 torpedoes. It has been shown that even with a glance hit, the force of the explosion can damage considerably a MS.
  • Surface-to-Air Missile Launcher
For its purpose which is similar to a submarine, the Grublo can launch 16 naval-use Surface-to-Air (SAM) missiles from 2 launchers in its body. They are mainly used to destroy military targets near the shore, like docks or shipbuilding yards.
  • Underwater-use Bits
The Grublo Underwater Bit Mounted Prototype replace its two claw arms for two bits, a type of mobile pod weapon that is equipped with a rocket thruster, verniers, a power generator, a single beam gun, and a receptor designed to work in conjunction with the Psycommu system. Their systems are designed to allow the bit an extended operating time independent of its carrier. The Psycommu system allowed the bits to receive commands via psycowaves from the pilot, thus allowing for control that is not interrupted by Minovsky particles.

Special Equipment & Features

  • Sonar Dome
The Grublo Underwater Bit Mounted Prototype features a sonar dome, the same device used by submarines and surface ship. Its purpose is to house electronic equipment used for detection, navigation, and ranging, tasks which are critical to a naval MA.
  • Psycommu System
During the One Year War, the researchers of the Flanagan Institute discover that Newtypes emit powerful thoughtwaves - similar to regular brainwaves, but not electrical in nature - which they call psycowaves. The Flanagan Institute goes on to develop a mind-machine interface called the psycommu (psyco-communicator) system, which receives these thoughtwaves and translates them into computer commands. Using this interface a Newtype pilot can direct remote weapons and operate huge mobile armors by thought alone.


Tests were conducted for about two weeks, during which it encountered two Earth Federation Forces warships, which were sunk in less than an hour. Although the development team was satisfied with its performance, the MAM-07-X3 was not formally adopted for production and is later restored to a standard Grublo.



MSV-R Mechanics
Earth Federation
Mobile Weapon
Full Armor Gundam's variations
FA-78-1B Full Armor Gundam Type B | FA-78(G) Full Armor Gundam Ground Type
Heavy Gundam's variation
FA-78-2 Heavy Gundam (Unit 2)
GM Cannon's variations
RGC-80-1 GM Cannon Test Type | RGC-80S GM Cannon Space Assault Type
GM Sniper Custom's variations
RGM-79HC GM Guard Custom | RGM-79KC GM Interceptor Custom | RGM-79SC GM Sniper Custom (Shimoda Squad Type)
GM's variations
RGM-79LV GM Night Seeker II | RGM-79U GM Sloep | RGM-79V GM Night Seeker
Guntank's variation
RMV-3M Local Control Type Guntank
Guncannon's variation
RX-77-3D Guncannon Heavy Arms Type D
Gundam's variation
RX-78-2 Gundam Real Type | RX-78SP Gunner Gundam
Ball's variations
RB-79F Ball Type F | RB-79M Ball Type M

Aircraft / Spacecraft
FF-S5 Raven Sword | FF-X5 Prototype Core Fighter | FF-X7BstPLAN004 Core Booster Plan004 | G-Fighter Assault Landing Type | G-Fighter Bomber Type | G-Fighter Space Type
Transporter / Supply Ship
CB-X5(SGT) Assault Type Gunperry
Cruiser / Mother Ship
SCV-102 Nelson
Principality of Zeon
Mobile Weapon
Agg's variation
EMS-05F Azock
Zaku I's variation
MS-05Q Zaku I (Norris Custom)
Zaku II's variations
MS-06A Zaku II First Mass Production Type | MS-06FS Zaku II | MS-06R-1A Zaku II High Mobility Type | MS-06S Zaku II Commander Type
Zaku II Ground Type's variations
MS-06D Zaku Desert Type | MS-06G Zaku II High Mobility Ground Type | MS-06GR Zaku II High Mobility Ground Type Kai | MS-06JK Zaku Half Cannon | MS-06K Zaku Cannon (Gatling Gun Equipment Type) | MS-06V-8 Zaku Tank (Wild Boar)
Gouf's variations
MS-07G-1 Gouf Vijayanta | MS-07G-2 Gouf Tactical Assault Type | MS-07W Gouf Combined Test Type
Dom's variations
MS-09 Dom Cold Climate Type | MS-09M Dom Mermaid | MS-09R Rick Dom Dozle Zabi Custom | YMS-09J Dom High Speed Experimental Type
Gelgoog's variations
MS-14B Gelgoog Uma Lightning Custom | MS-14BR Gelgoog High Mobility R type | MS-14C-1A Gelgoog Cannon | MS-14GD Gelgoog G
Z'Gok's variation
MSM-07N Ram Z’Gok
Gyan's variation
YMS-15E Gyan Eos
Bigro's variation
MA-05R Big Ruf
Grublo's variation
MAM-07-X3 Grublo Underwater Bit-Mounted Prototype
Zakrello's variation
MAN-00X-2 Brawrello
MSM-06 Jurick

Aircraft / Spacecraft
Dodai GA | G87 Luna Tank | Gobble
Cruiser / Mother Ship
CCM-91 Chimaira | Gagaul-class
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