Gundam Heavyarms

Bandai Gundam MG 1 100 GUNDAM HEAVYARMS EW  739032
Bandai Gundam MG 1 100 GUNDAM HEAVYARMS EW 739032
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MSIA Heavyarms gundam yellow ver wing
MSIA Heavyarms gundam yellow ver wing
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Bandai 1100 MG XXXG 01H Heavyarms EW Ver Gundam Wing Gundam Series Model Kit
Bandai 1100 MG XXXG 01H Heavyarms EW Ver Gundam Wing Gundam Series Model Kit
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Bandai 1 100 MG Gundam W Wing Heavyarms EW Model Kit
Bandai 1 100 MG Gundam W Wing Heavyarms EW Model Kit
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Special Detail Up Decal For 1 100 MG XXXG 01H Heavyarms Gundam Model Kik 5932
Special Detail Up Decal For 1 100 MG XXXG 01H Heavyarms Gundam Model Kik 5932
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HEAVYARMS CUSTOM GUNDAM BATTLE SCARRED MOSC
HEAVYARMS CUSTOM GUNDAM BATTLE SCARRED MOSC
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JAPANESE HEAVYARMS Gundam Msia Action Figure bandai 100 COMPLETE 01120374W0072
JAPANESE HEAVYARMS Gundam Msia Action Figure bandai 100 COMPLETE 01120374W0072
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Bandai Gundam Wing Endless Waltz MSIA Action Figure Heavyarms Custom
Bandai Gundam Wing Endless Waltz MSIA Action Figure Heavyarms Custom
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2000 BANDAI MOBILE SUIT GUNDAM WING HEAVYARMS MLC
2000 BANDAI MOBILE SUIT GUNDAM WING HEAVYARMS MLC
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BANDAI SD Gundam Action Figure Wing Endless Waltz Heavyarms Custom BB Mini
BANDAI SD Gundam Action Figure Wing Endless Waltz Heavyarms Custom BB Mini
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Gundam Mobile G Fighter GUNDAM HEAVYARMS CUSTOM Complete with cardback
Gundam Mobile G Fighter GUNDAM HEAVYARMS CUSTOM Complete with cardback
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Bandai model kit Gundam MG 1100 Gundam Heavyarms EW
Bandai model kit Gundam MG 1100 Gundam Heavyarms EW
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Battle Scarred Heavyarms Custom Gundam Action Figure Complete
Battle Scarred Heavyarms Custom Gundam Action Figure Complete
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Gundam MG Heavyarms EW Ver 1 100 Scale
Gundam MG Heavyarms EW Ver 1 100 Scale
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SD Gundam Online Wing OVA Endlesswaltz Altron Heavyarms deathscythe Sandrock lot
SD Gundam Online Wing OVA Endlesswaltz Altron Heavyarms deathscythe Sandrock lot
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BANDAI BB SD MS Wing Gundam Heavyarms Custom Endless Waltz 4 Action Figure
BANDAI BB SD MS Wing Gundam Heavyarms Custom Endless Waltz 4 Action Figure
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Mobile Suit Gundam Wing Battle Scarred Gundam Heavyarms Custom Action Figure
Mobile Suit Gundam Wing Battle Scarred Gundam Heavyarms Custom Action Figure
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MSIA Heavyarms custom gundam wing gold ver
MSIA Heavyarms custom gundam wing gold ver
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Gundam Heavyarms Tribute - Endless Duel Remix

Heavy Arms or Optimus?

Who would win in a fight? Gundam Heavyarms, or Optimus Prime.
Assume weapons for both are as follows:

Heavyarms:
Arm Cannon, 4500 rounds
Chest mounted machine guns 2500 rounds
Beam Saber
Shoulder mounted Missile Pod 250 rounds

Optimus:
Laser Rifle/shotgun infinite rounds
Arm mounted laser axe
Eye lasers infinite rounds

Assume both are at their best fighting form and are in perfect condition to start off the battle.
To add some details

Heavyarms is piloted by Trowa Barton, and he is piloting Kai.
Optimus is not energon dependent.

Who's piloting Heavyarms? (And which rendition: V1, Kai, or Custom?)

Optimus is subject to energon dependency. Does this factor into the matchup?

Prime's fate hinges on your answer.

EDIT: At first glance, I'd say Heavyarms has Optimus completely outclassed. The Gundams of the After Colony timeline have that incredible armor bonus going for them (virtually no damage from an orbit-to-surface crash-landing, retaining recognizeable shape after being hit by a planet-buster), and Heavyarms in particular has got some, well, heavy plating.
Add to that its middle-to-long-range capabilities, and it's really just a case of getting off that first shot. Its Kai upgrade has a better set of thrusters as well, so it's not confined to an immobile ground platform when engaged.

Optimus isn't without his own advantages, though. While his aerial capabilities may be limited, he (and most Transformers) is deceptively nimble on foot. Depending on the terrain, it could be quite feasible for Optimus to deplete Heavyarms' long-range munitions and force a close-quarters match. He's still at a distinct disadvantage in terms of armor (contrast the effect of Megatron's beam saber on Optimus to the Tallgeese's repeated high-velocity strikes vs. Heavyarms), but his footwork could be played to even greater effect here -- Trowa's pretty limber, but his mobile suit isn't playing his part in the circus anytime soon.

Really, this could go either way. Heavyarms has a strong case for an alpha-strike win, and I'm leaning toward that, but Optimus isn't decisively out of the running.