Geobreeders (1998) and Geobreeders: Breakthrough (2000) are two OVA series based on Akihiro Ito's on-going manga of the same name. The story depicts members of Kagura Total Security as they fight against the Phantom Cats. Kagura's main business rival is Hound, a secret government paramilitary organization under the control of the Ministry of Health and Welfare.
Phantom cats are mystical beings capable of taking both human and feline forms as well as manipulating all form of eletronic signals. This ability makes the cats master of information manipulation. Physical attack against the cats in human form will not permanenetly harm them as the cats have the ability to regenerate in human form. Hound's specially designed EM field generators, when deployed, can neutralized Phantom Cats' abilities such as regeneration or escape through telephone lines. In order to eradicate them, Cats needs to be "sealed" using specially designed tags or other devices.
The OVA storylines are considered canon and are incorporated into the main manga story.
The following weapons are seen in the anime Geobreeders and it's sequel Geobreeders: Breakthrough
A pair of Mauser M712 Schnellfeuer pistols are Kagura member Maki Umezaki's weapons of choice. Umezaki (who calls herself the Crimson Shooting Star) is usually seen firing them akimbo.
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Browning Hi-Power
In Geobreeder:Breakthrough, Umezaki's rival (who calls herself the Indigo Shooting Star) uses a pair of heavily customized Browning Hi-Power pistols as her sidearms.
SIG P226
The SIG-Sauer P226 is Hound's standard issued sidearm. Several P226s fitted with laser aiming devices are also used by Irie's bodyguards.
SIG P228
Ayumi Narusawa, the only female Hound member, uses a SIG-Sauer P228.
Beretta 92F
Some of the assassins attempting to kill Irie are armed with Beretta 92F pistols.
Makarov PM
Alberto, the leader of the rogue Phantom Cats in Breakthrough, used a Makarov PM when he held Narusawa hostage.
Two Smith & Wesson Model 60 revolvers were used by Umezaki and Indigo Shooting Star during their final failed duel attempt.
Shotguns
Mossberg 500 Cruiser
During the fail assassination attempt of Irie, an assassin was seen using a Mossberg 500 Cruiser.
Saw-off Double Barrel Shotgun
One of the Phantom Cats used a saw-off double barrel shotgun to fend off other cats chasing after him.
Submachine Guns
Heckler & Koch MP5K PDW
SEAL operators disguised as a mailman, delivery man and vegetable salesman attacked Kagura's office with MP5K PDW. The PDW stocks are removed for better concealment.
M1928 Thompson Submachine Gun
During the assault on the Russian cargo ship, Umezaki was seen firing a M1928 Thompson Submachine gun at the Phantom Cats.
MP40
After Umezaki's Thompson ran out of ammo on the Russian cargo ship, Yu Himehagi handed her a MP40 and she used it to take out several Phantom Cats.
SA Vz.61 Skorpion
Her MP40 presumably also out of ammo, Umezaki was seen with a Vz.61 Skorpion submachine gun.
Sterling SMG
Indigo Shooting Star uses a Sterling SMG when attacking Kagura's van on the freeway in Breakthrough. When she runs out of ammo, she simply discarded the Sterling and picked up another.
Heckler & Koch MP5
The unknown assassins who attacked Irie are armed with Heckler & Koch MP5.
PPSh-41
The old man who took the Kagura crew in during Breakthrough had a secret stash of Soviet weapons under his living room tatami, which include at least two PPSh-41 submachine gun. Kagura company president Yuka Kikushima used one during the fire fight.
Unknown Submachine gun
Rifles
SIG SG 551
SIG SG 551 assault rifle is the standard assault weapon of Hound. Some are fitted with tactical lights or laser aiming devices.
AKS-47
The Phantom Cats used smuggled AKS-47 assault rifles as their main weapons.
M4A1
Indigo Shooting Star used an M4A1 fitted with a scope in a failed attempt to kill Umezaki. The M4A1 was later seen with a M203 grenade launcher.
M16A1
During the fire fight in the old man's house, Indigo Shooting Star's primary weapon switched from a M4A1 to a M16A1, also fitted with a M203 grenade launcher.
Sniper Rifles
Walther WA 2000
Indigo Shooting Star used a Walther WA 2000 sniper rifle in her first attempt to take out Umezaki, intentionally shooting Umezaki's hat off and rupturing the gas line of Kagura's office. The ruptured gas line caused an explosion when Himehagi lit a cigarette.
Remington Model 700
Hound snipers used Remington Model 700 during the assault on the DDK building.
Lahti L-39
During the SEALs raid on Kagura's office, Umezaki took out a Lahti L-39 anti-tank rifle, but was unable to use it due to the AH-1W's 20mm suppressive fire. In order to increase her firepower, she modified the L-39 to accept a drum magazine and turned it into a heavy machine gun, which was considered reckless by the owner of the machine shop where she finished her modification. The English DVD incorrectly translated it as "Ratti machine gun".
Denel NTW-20
In a final attempt to kill Umezaki, Indigo Shooting Star used a NTW-20 anti-material rifle to shoot the nature gas pipe line near the hot spring where Umezaki was taking a bath. The gas was once again ignited by Himehagi's cigarette.
Machine Guns
MG34
During the attack on the Russian cargo ship, Umezaki was seen firing a MG34 machine gun from Kagura's ship.
PK Machine Gun
During the assault on the DDK building, the Phantom Cats used PK machine gun to fight off the Hound.
FN MAG
During the shootout, Indigo Shooting Star used a remote controlled FN MAG to lay down suppressing fire.
GE M134
Hound's V-22 Osprey is armed with GE M134 minigun. During the attack on the DDK building, the M134 was used to destroy the water tanks on top of the building to stop the sprinkler system.
Browning M2
A Browning M2 heavy machine gun is seen mounted on top of the turret a JGSDF Type 90 tank stolen by the Cats. Hound also deployed M2 on their personnel transport (disguised as garbage trucks) during the attack on the DDK building.
General Dynamics M197 Vulcan
A disguised USMC AH-1W Super Cobra fired its M197 20mm gun to cover the SEAL team's extraction. It was referred to as "20mm Vulcan" by Umezaki and Eiko Rando. However, in the US DVD release, it was incorrectly translated as "20mm Balkan".
General Dynamics GAU-12 Equalizer
USMC AV-8B Harriers IIs were armed with GAU-12 25mm gun pods. A Harrier hijacked by the Cats was used to shoot down two other Harriers and strafed the Hounds.
ZPU-1
Phantom Cats on the Russian cargo ship fired a ZPU-1 anti-aircraft machine gun at Hound's chopper, but failed to shoot it down.
Heckler & Koch HK69
Hound uses modified HK69 grenade launcher to fire special grenade that would allow them to seal the Phantom Cats. HK69s are also used to fire smoke grenades.
Grenade Launchers
Milkor MGL
During the assault on the Russian cargo ship, Umezaki fired several HE grenades from her Milkor MGL launcher, but failed to breach the hull of the ship.
A RPG-7 can be seen in Umezaki's office locker, but it was destroyed by the AH-1W's 20mm fire before it could be used. Several Phantom Cats were armed with RPG-7s during the attack on the DDK building.
M72 LAW
Hound commander Captain Yashima fired a modified M72 LAW to seal the Phantom Cat that hijacked the Harrier.
Hand Grenades
M67 Grenade
Kagura employee Takami Sakuragi's weapon of choice is a butterfly knife with a M67 hand grenade attached to it.
M61 Grenade
The SEALs that attacked Kagura's office used a M61 hand grenade to initiate their attack.
F-1 Hand Grenade
The old man's secret stash included several Russian F-1 hand grenades. Sakuragi used one of these grenades during the shootout.
RGD-33 Stick Grenade
Besides the F-1s, the majority of the old man's grenade collection are RGD-33 stick grenades.
Other Weapons
Hunting Rifle
The old man use a hunting rifle, which was accidentally set off by Umezaki, trigging the fire fight.