Technology & Combat Characteristics
Since the Earth Federation was far behind in Newtype research and had little understanding of psycommu system technology, they had to figure out by themselves how the system works, initially with technologies they were utterly familiar with. The RB-79 Ball is remodeled into an attack pod that is mounted on both shoulders, and the cockpit is diverted from the TGM-79 GM Trainer to make it a double seater, so that the gunner can manually control the attack units. In addition, RX-78NT-1's Chobam Armor, which was being developed at that time, was diverted to improve the armor's defenses to deal with the gaps during manual control.
- 60mm Vulcan Gun
- These shell firing weapons have high rate of fire but little power, and can't damage the armor of a mobile suit. However, they can damage lightly armored areas such as the sensors, and are ideal for shooting down small, lightly armored targets such as missiles, attack vehicles, etc.
- Remote Controlled Ball Unit
- There are two (four in total) beam rifles installed on the two balls mounted on both shoulders. In combat, the gunner of the GM Juggler manually controls these units with laser communication, performing a makeshift imitation of all-range attacks.
- HWF GMG·MG79-90mm Bullpup Machine Gun
- The bullpup machine gun was a system weapon developed as a Space/Ground dual use projectile weapon. Though compact, it has sufficient anti-MS firepower while maintaining accuracy. Its muzzle velocity is increased due to the use of new gunpowder and this enables it to easily penetrate the armor of Zeon's mobile suit. A box-like sensor system incorporating a video camera and laser sensor is installed at the top, and when this system is used alongside the GM's targeting system, target acquisition capability is enhanced.
It turned out to be fraught with difficulties even just to imitate the psycommu system- the manually-controlled all-range attack never performed satisfactorily- and the added bulk of the remote attack units contributed to the excessive topweight and consequently poor mechanical balance of the GM Juggler. Repeated improvements were made in an effort to overcome these flaws, and this difficult development process continues until the end of the One Year War without producing a viable overall result. With the latest psycommu technology falling into Federation hands by the end of the war, the GM Juggler was no longer needed, leading to an end of its development.