When the Gantz ball opens, the rack that appears at the back of Gantz, contains cases with everyone’s name on them. Inside they find a skin-tight bodysuit which is attuned to an individual body and can only be utilized by that specific Hunter. These suits provide the wearer with incredible strength, speed, endurance, and the ability to jump very high, as well as land without problems thanks to the shoes which are seen to release a white smoke to cushion one returning from a high jump. The suit also provides the hunter with an almost impenetrable protection to his/her body, even to the head, which is fully exposed. Large caliber bullet rounds to the face do not leave so much as a bruise. It should be noted, however, that the suit only seems to protect from conventional attacks such as bullets and punches as well as normal swords and the Gantz swords but does not seem to do anything for other slicing attacks like from a laser or certain acids. When in full use, the suits’ artificial muscles expand, making the Hunter appear larger. The suits also allow the wearer to easily lift over fifty times their weight and jump well over thirty feet high. However, the amount of damage it can sustain is limited. Should the suit receive too many powerful impacts without time to recover, the “caps” along the suit will break, releasing the essential substance that powers it, rendering it as useful as ordinary clothes. One can also attack the caps directly and release the fluid that powers it, as seen done by the Vampires and Izumi on different occasions. It should also be noted that attacks from the X-gun or X-rifle, will destroy the caps and render the suit useless. The suit limit of power also varies on the user, the stronger the person the stronger the suit. Also emotional stress can damage the suit.

Controller

Called a controller in the Gantz manual, it is commonly referred to as a radar throughout the series, although it has other functions. It is a device used to track the targets, displaying the targets as well as fellow team mates on its screen. However, the marker on the radar is not very precise and has created many situations in which the Hunters ran into trouble pinpointing the exact number and location of the targets. These are found in one of the weapon racks that is revealed when the Gantz ball opens. They allow for changing of someone’s frequency, rendering them invisible to those not on the same frequency. This allows them to turn invisible to other people. Vampires can counter this effect by wearing special glasses or contacts, designed for this purpose. The boss monster in the Temple mission has been shown to be able to see a person even when they were invisible, as has a powerful alien in the Osaka mission. They also display the time left in a mission and display the boundaries of the mission area which no Hunter can pass through unharmed.
 

Gantz Sword

The only melee weapon revealed so far. It is a katana-like weapon that is usually in a closed hilt-only state. When in use, an incredibly sharp blade extends from the hilt. It can extend without loss of durability and it is unknown if its length is limited; currently it has only been extended to roughly 30 feet. The swords are seen scattered amongst the floor in the same room as the Monobikes, which only unlocks after the Gantz ball opens up. None of the current Tokyo Gantz team members knew of this until after Izumi appeared before the Dinosaur mission. After that mission, others are shown with swords as well. The Gantz sword can be used while in stealth mode, even when at maximum reach. The only time that the sword is shown to break is during the Italy mission when Kurono and Kato use it to attack two Roman Statue Aliens

May Reference:

X-Gun

The X-gun is a small handgun-sized weapon, that gets its name from the four protrusions around the barrel that spread out like an “X” when fired. The X-gun uses compressed energy as its ammo. It fires until it hits something, then explodes inside the target after a delay. A drawback to this weapon is that it has a significant time delay between the triggers being pressed and the projectile being fired/impacting the target, during which the enemy can easily dodge it, use an object as a shield, or kill the wielder. It features an X-ray monitor in the back. Later in the manga, the X-ray device is revealed to be part of a lock-on system that can target multiple enemies at once. It has an oddity shared by the X-Shotgun: it has two triggers. The upper trigger is pulled by the pointer finger, causing the gun to lock onto a target displayed on the monitor. The lower trigger fires the weapon on the target, even if the gun is no longer facing that direction. To fire it in a running battle, one must pull both triggers simultaneously. There is also a dial at the top which can be used to affect the explosive level of the blast.

Y-Gun

It is a handgun that has the same lock-on capabilities of the X-Gun, but rather than fire out an explosive payload, it instead launches three “laser anchors” connected by ropes. This wraps around the target, securely tying them up, before the anchors are buried into the ground. Once this is done, the target can be sent away, by the same fax like method Gantz uses to transfer the hunters to and from missions. It is not known if they are simply sent and never made to reappear anywhere else, or sent off to some unknown location where they presumably die. In the Temple mission, Katou used a Y gun to send the alien boss, who then ejected his head from the body, and then ejected himself and formed a new body. Even after the separated head has finished being sent away, we see the old body itself being sent also, showing that in the manga, once a target has been locked onto, cutting off the top does not stop the rest from being sent as well. The rule is different in the anime, when that same boss just cut off the very top of his head, and that got sent and not the rest of him. Both triggers are pulled to fire a snare. Individually the top trigger on the Y-gun is used for locking on, while the bottom is for initiating the “send.” This weapon gets its name from the “Y”-shaped barrel that the net launches from.

Z-Gun

It seems to apply severe gravitational force in a circular area and force everything within range of the shot to slam into the ground or be flattened, even a few inches of the floor below the shot is cut out. Some powerful enemies have been shown to survive multiple blast with this weapon. Exceptionally strong enemies have been shown to partially resist the gravity effect with sheer, brute strength. The Z-Gun doesn’t appear to have a time-lag.