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The RX-77-4 Guncannon II is a mobile suit developed from the RX-77-3 Guncannon Heavy Custom. It was first featured in the original design series Mobile Suit Variations.

Technology & Combat Characteristics

Near the end of the One Year War, the Earth Federation Forces used the RX-77-3 Guncannon Heavy Custom as a base to develop a new Guncannon-type unit, the RX-77-4 Guncannon II. The Guncannon II also incorporated data from other prototype machines and became the final model in the RX-77 series. Unlike its base machine, the Guncannon II has a beam cannon on its right shoulder to resolve the balance and recoil issues related to using projectile cannons. The use of a beam cannon over two projectile cannons is also meant to help enhance the suit's firepower and ease of production.

The beam cannon is operated alongside a multipurpose precision targeting system on the left shoulder for improved firing accuracy. The switch to a beam cannon also saved up space on the back meant for storing physical ammunitions, as well as vents for expelling the projectile cannons' exhaust gas. A new propulsion system with large thrusters is installed in this saved space, and coupled with the Guncannon II's reduced weight, the suit not only has improved thrust power in space but could also carry out short distance jumps while under gravity. This is a surprising level of mobility for a heavy mobile suit.


  • Vulcan Gun
A pair of shell-firing armament built into the head. Low offensive power, only used to restrict enemy movement, and lay down a wall of suppressive fire due to their rapid-fire capability.
  • Beam Cannon
Mounted on the right shoulder, it is powered by the suit's generator and capable of continuous fire. Used for mid-long range attacks.
  • XBR-M-79a Beam Rifle
The Guncannon II can be equipped with the same beam rifle as used by the RX-77-2 Guncannon. This particular beam rifle is specialized for sniping. Compared to the beam rifle used by the RX-78-2 Gundam, it was harder to use but had higher accuracy and longer range. It is said to have a range of around 30km.
  • YHI YF-MG100 100mm Machine Gun
The standard armament for Federation's mobile suit ground forces during the One Year War that was developed by Yashima Heavy Industries. It has an alternate model number: "NF·GMG-Type.37/100mm". Equipped with a box magazine and folding stock, it has excellent rate of fire and is easy to wield. It utilized a smoothbore type barrel that lacked rifling and has to be replaced after firing 3000 rounds. The weapon could utilize three different types of ammunitions: HEAT (High Explosive Anti-Tank), APFSDS (Armor-Piercing Fin-Stabilized Discarding-Sabot), and HESH (High Explosive Squash Head), allowing combat units to select the appropriate type to meet operational needs.
  • "Fire Nut" Grenade
An unknown number of "Fire Nut" grenades are stored in a rack on the Guncannon II's left side armor. Thrown like regular grenades when used, it engulfs the target in flames upon impact.

Special Equipment & Features

  • Multipurpose Precision Targeting System
Mounted on the left shoulder, this system grants the Guncannon II better firing accuracy during long range bombardments.


Eight RX-77-4 Guncannon II units were built at the recaptured California Base in North America and several Guncannon IIs participated in the Earth Federation Force's North American offensive.





External Links

MSV Mechanics
Earth Federation
Mobile Weapon
Gundam's variations
FA-78-1 Full Armor Gundam | PF-78-1 Perfect Gundam | PF-78-3 Perfect Gundam III | RX-78-1 Prototype Gundam | RX-78-3 Gundam "G-3"
GM's variations
RGC-80 GM Cannon | RGM-79L GM Light Armor | RGM-79SC GM Sniper Custom | TGM-79 GM Trainer
Guntank's variation
RMV-1 Guntank II
Guncannon's variations
RX-77-3 Guncannon Heavy Arms Type | RX-77-4 Guncannon II

Land Vehicle
Aircraft / Spacecraft
AF-01 Mongoose | FF-3 Saberfish | FF-6 TIN Cod | FF-S3 Saberfish | Flatmouse | Flydart
Principality of Zeon
Mobile Weapon
Zaku I's variation
MS-05A Zaku I Early Type
Zaku II's variations
MS-06A Zaku II First Mass Production Type | MS-06C Zaku II Early Production Type | MS-06E Zaku Reconnaissance Type | MS-06E-3 Zaku Flipper | MS-06F Zaku Minelayer | MS-06F Zaku II Dozle Zabi Custom | MS-06FS Zaku II | MS-06M Zaku Marine Type | MS-06R-1 Zaku II High Mobility Test Type | MS-06R-1A Zaku II High Mobility Type | MS-06R-2 Zaku II High Mobility Type | MS-06R-2P Zaku II High Mobility Test Type | MS-06RP Zaku II High Mobility Test Type | MS-06T Zaku Trainer Type | MS-06W Worker Zaku | MS-06Z Psycommu System Zaku | MSN-01 Psycommu Test High Mobility Type Zaku
Zaku II Ground Type's variations
MS-06D Zaku Desert Type | MS-06G Zaku II High Mobility Ground Type | MS-06J Zaku II Ground Type | MS-06K Zaku Cannon | MS-06V Zaku Tank | MS-06V-6 Zaku Tank Green Macaque
Gouf's variations
MS-07A Gouf | MS-07B Gouf M'Quve Custom | MS-07C-3 Gouf Heavy Arms Type | MS-07C-5 Gouf Test Prototype | MS-07H Gouf Flight Test Type | MS-07H-4 Gouf Flight Test Type | YMS-07A Prototype Gouf | YMS-08A High Mobility Prototype
Dom's variations
YMS-09 Prototype Dom | YMS-09D Dom Tropical Test Type
Gelgoog's variations
MS-14B Gelgoog High Mobility Type | MS-14C Gelgoog Cannon
Acguy's variations
MSM-04G Juaggu | MSM-04N Agguguy
Zeong's variation
MSN-02 Perfect Zeong
EMS-05 Agg | MSM-08 Zogok
Mobile Weapon
Mobile Pod
SP-W03 Space Pod

MS-X Mechanics
Earth Federation
Mobile Weapon
Mobile Suit
FA-78-2 Heavy Gundam | RGM-79L GM Light Armor | RX-77-3 Guncannon Heavy Arms Type | RX-77-4 Guncannon II | RX-78-3 Gundam "G-3" | TGM-79 GM Trainer

Aircraft / Spacecraft
Corvette Booster | Guncarry | Lightliner
Support Weapon
Principality of Zeon
Mobile Weapon
Mobile Suit
MS-06R-2 Zaku II High Mobility Type | MS-10 Pezun Dowadge | MS-11 Act Zaku | MS-12 Gigan | MS-13 Gasshia | MS-17 Galbaldy α

Aircraft / Spacecraft
Support Weapon