Pilot the Heavyarms Custom

Gundam Heavyarms Custom is Aan upgrade of the Heavyarms Gundam to make it worthy for space combat. Besides a new dark blue-green color scheme, the Heavyarms Custom also sports two more chest gatling guns, and uses a pair of double gatling guns as its main weapon. In the Glory of the Losers manga, thrusters are added to the central part of the backpack and the rear skirt armor. Thrusters are added to the central part of the backpack and the rear skirt armor.

The Heavyarms is a long-range attack unit with a variety of built-in firearms. Its design is a combination of the firepower aspect with an emphasis on overwhelming suppressive fire. Its overall firepower is comparable to three to five battleships', but its attack power drops drastically once it run out of ammunition. However, the Heavyarms is also capable of acrobatic melee combat.

The Vulcan Guns are 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.

The Machine Cannon is mounted on the clavicle section of the Heavyarms, the pair of machine cannons have stronger firepower than the vulcan guns.

Two pairs of gatling guns mounted in both sides of the chest, they are hidden by openable armor covers. They can be fired together with the machine cannons and vulcan guns to restrict enemy units from closing in.

44 homing missiles are stored in the front skirts and leg missile pods, they are fired towards an enemy/enemies with a lock on.

The Heavyarms Custom has 52 micro missiles and they are stored in the shoulders and the side skirts.

A pair of handheld gatling guns with two sets of barrels are the main armament of the Heavyarms Custom. Unlike the original Heavyarms, the optional shield is eliminated and the gatling guns seem to fire physical rounds, but there are claims that they can also fire beams. When not in use, they are mounted on the backpack's foldable arms.

The Gundam Heavyarms Custom was built to self-destruct should the pilot choose to. A remote detonator is placed within the cockpit and if a dire situation arrives, the pilot can destroy the Mobile Suit. The system was designed to overload its power systems and has enough explosive power to destroy several city blocks. It's a last option tactic if the pilot is incapable of protecting the Mobile Suit, while not allowing it to fall into enemy hands. It also can be used as one large explosive device to eradicate large targets.

A decorative half-face mask in the style of a pierrot, it completely covers the right side of the face when equipped. It is white with a blue four-pointed star over the eye and a highly-exaggerated red smile..