Names：

GM Cannon

（RGC-80）
Status： MS of E.F.F
Tags： Mobile SuitEarth Federation Forces (U.C.)Mass Production
Development： GM Cannon IIGM Cannon Test Type
Original Design： Roshoku GM CannonCultivating Priest GM CanonDriver GM Cannon (Thunderbolt Ver.)
World： the World of Mobile Soldiers
Works： MSV Mobile Suit Variation SeriesUniversal Century Series
LeveL： B

The RGC-80 GM Cannon is a mass-produced artillery mobile suit and a variant of the RGM-79 GM. It is featured in the original design series Mobile Suit Variation and in the TV anime Mobile Suit Zeta Gundam.

Originally, it was planned for the RX-77-2 Guncannon to be mass-produced with a few tweaks to its design, but in consideration of the wartime situation, the design was changed to make use of the existing production line of the RGM-79 GM. Following a series of trial and error, the GM Cannon was created as a simplified mass production model of the Guncannon. A medium-range support mobile suit, the GM Cannon shares 60% of its parts with the GM, and has a high initial velocity cannon of the same caliber as the Guncannon's attached to its notched right shoulder. Its legs are fitted with removable left and right split type increased armor to maintain the mobile suit's balance when firing the cannon during ground combat.

Initially only six RGC-80 GM Cannons were produced and fielded as part of the Earth Federation Forces's campaign to retake the North American continent. By the time the Earth Federation Forces had recaptured California Base from the Principality of Zeon forces on North America's Pacific Coast, the GM Cannons had proven themselves on the field and was approved for mass-production. Additional GM Cannons were constructed and distributed to various Earth Federation Forces battalions around the Earth to assist in driving the Zeon forces back to space.

The RGC-80 GM Cannon is a mass-produced artillery mobile suit and a variant of the RGM-79 GM. It is featured in the original design series Mobile Suit Variation and in the TV anime Mobile Suit Zeta Gundam.

Originally, it was planned for the RX-77-2 Guncannon to be mass-produced with a few tweaks to its design, but in consideration of the wartime situation, the design was changed to make use of the existing production line of the RGM-79 GM. Following a series of trial and error, the GM Cannon was created as a simplified mass production model of the Guncannon. A medium-range support mobile suit, the GM Cannon shares 60% of its parts with the GM, and has a high initial velocity cannon of the same caliber as the Guncannon's attached to its notched right shoulder. Its legs are fitted with removable left and right split type increased armor to maintain the mobile suit's balance when firing the cannon during ground combat.

Initially only six RGC-80 GM Cannons were produced and fielded as part of the Earth Federation Forces's campaign to retake the North American continent. By the time the Earth Federation Forces had recaptured California Base from the Principality of Zeon forces on North America's Pacific Coast, the GM Cannons had proven themselves on the field and was approved for mass-production. Additional GM Cannons were constructed and distributed to various Earth Federation Forces battalions around the Earth to assist in driving the Zeon forces back to space.