Technology & Combat Characteristics
Following the Zimmad Company's MSM-03 Gogg, the Zeonic Company produced their own amphibious mobile suit for the Principality of Zeon, the MSM-04 Acguy. The Acguys used many of the same parts and components as the MS-06F Zaku II, including twin Zaku II F-Type Minovsky Ultracompact Fusion Reactors. However, even with the twin reactors, the Acguy left only a trace heat signature, making it effective for stealth and infiltration operations. It is also one of the tallest amphibious mobile suit used by the Zeon during the war.
The Acguy's weapons consisted of four 105mm vulcan guns mounted in its unusually large head. In its right forearm was a mega particle gun, but in some units, this was replaced by a vulcan gun. The right forearm also had extendable claws known as Iron Nail (along with an extendable arm to increase striking distance) for striking the Earth Federation's mobile suits and property. In the left forearm was a six-tube missile launcher. Some models also had missile launchers in the right forearm, replacing the mega particle cannon and claws.
- 105mm Vulcan Gun
- Small pocket turrets found on the top of the head. They release a burst of gunfire for close-combat and for taking out smaller units.
- 6-tube Missile Launcher
- Missiles can be fired from its left arm rapidly to destroy mobile suits, land vehicles, and buildings. The missiles are usually fired individually.
- Mega Particle Cannon
- Powerful beams can be fired from the right arm to pierce enemy armor and buildings for effective damage. It is often used at medium to long-range.
- Vulcan Gun
- Some Acguys have another vulcan gun in its right arm instead of the mega particle cannon.
- Iron Nail
- Mounted in the right arm are six extendable claws for stabbing mobile suits. When not in use, the claws are hidden in the arm. The claws can also be used for grappling as seen during the invasion of Jaburo when a group of Acguys was traversing the tunnels of Jaburo and can function as a manipulator if required.
Special Equipment & Features
- Interchangeable Forearms
Several MSM-04 Acguys sneaked into the Federation's Jaburo General Headquarters on November 30, U.C. 0079 on a covert mission to destroy the Federation's mobile suit production facilities, which were being used to produce their RGM-79 GM mass-produced mobile suit.
Notes and Trivia
- The Acguy has a large fanbase that considers it to be moe character. It's also a stock joke character 
- There are many conflicting accounts on whether the weapon mounted on the Acguy's right arm was a Vulcan gun or a mega particle cannon. The HGUC manual suggested that most units were armed with a Vulcan gun, while a few were armed with a mega particle cannon.
- In Mobile Suit Gundam: Extreme Vs., Acguy has the ability to summon its later variants to attack, namely the MSM-04G Juaggu and the MSM-04N Agguguy. The victory screen even has them together as a group despite never having been commissioned side-by-side.
- In the late 90s, a Japanese fansite listed the Acguy's maker as a company named "Zwinemn". No such company existed in official media at the time, but in 2003, Zwinemn was introduced into Gundam canon when Anaheim Journal listed it as the Acguy's manufacturer. It also received a logo design.