A Beretta 8000 Cougar is used by a ESP terrorist working for the Professor in "White Girl".
Beretta 92F
A Beretta 92F is used by Kuroi Kozuki when she joins up with the Professor in the middle of "Meeting, Phantom and Girl". The Professor uses one as his main sidearm when he confronts the General, who uses the same weapon, near the end of "In Bitter Lament...". The former uses it as his main sidearm afterwards.
Glock 17
Glock 17 pistols are used by everyone in the Edoyama and Hotokeda-gumi as their main sidearm in the series. Kyotaro Azuma uses one in "Penguin and Girl" to wound Merayama in the leg, using it again near the end of "Tokyo ESP Girl". One was suppose to be used by Torada as his main sidearm in "Attack, ESP Girls". An ESP terrorist working for the Professor is armed with a Glock 17 that has a stainless steel slide near the end of "Tokyo Girls War".
Heckler & Koch Mk23 SOCOM
One of the Professor's masked subordinates uses a Heckler & Koch MK23 SOCOM with a silencer in "Tokyo Girl Wars".
M1911A1
In a flashback sequence of Azuma's childhood in "Penguin and Girl", a mobster opens fire during a hit with a M1911A1.
SIG P230
SIG P230s are used by Security Police officers in "White Girl".
Walther P99
The Walther P99 with a QPQ slide is used by Toru Kanze as his main sidearms, seen in "White Girl".
Revolvers
Nambu Model 60
Nambu Model 60s are used by Tokyo Metropolitan Police officers as their sidearm. One of the ESPers recruited by Minami uses a Model 60 seized from a police officer in the middle of "Tokyo Girls War".
Submachine Guns
Heckler & Koch MP5A3
Heckler & Koch MP5A3s are used by anti-ESP operators as their main submachine gun.
Assault Rifles
AKM
In a flashback sequence of Azuma's childhood in "Penguin and Girl", an AKM with a 30-round magazine was left on the ground after a shooting took place. Various factions use them as their main weapon throughout "In Bitter Lament..."
Heckler & Koch G36C
ESP terrorists working for the Professor are seen armed with the Heckler & Koch G36C in the show. Depending on the scene, they are usually seen with a mixture of vertical foregrips, red dot and EOTech sights. Brainwashed police officers are seen briefly with the G36C in "Tokyo Girls War".
Howa Type 89
Howa Type 89 assault rifles are used by JGSDF soldiers as their main assault rifle in the series.
Shotguns
Franchi SPAS-12
One of the Hotokeda-gumu wakashus is armed with a Franchi SPAS-12 shotgun with the buttstock removed at the start of "The Rain, Ring, and Girl".
Sniper Rifles
Barrett M82A1M
A Barrett M82A1M is used by one of the Professor's masked subordinates to take down the Cobra gunships in "White Girl".
Remington 700
Remington 700s are used by anti-ESP operators to fire non-lethal rounds, first seen in "Attack, ESP Girls".
Machine Guns
GE M61 Vulcan
M61 Vulcans are used by JASDF F-15 fighters deployed in "White Girl".
GE M197 Vulcan
M197 Vulcans are used by JGSDF AH-1 Cobra gunships in "White Girl".
Sumitomo M2HB
Sumitomo M2HB heavy machine guns are seen mounted on Japanese Ground Self-Defense Forces vehicles.
Grenades
Flashbang
The General's forces uses a flashbang to stun the occupants before they were massacred in "In Bitter Lament..." It externally resembles the M7 CS gas grenade.
M61 Frag Grenade
A M61 Frag grenade is lobbed at Rinka and the anti-riot officers by an ESP terrorist near the end of "Tokyo Girls War". Kuroi Kobushi uses one to take out the Professor near the end of "Tokyo ESP Girl".
M67 Grenade
What appears to be an M67 frag grenade is used by an ESP terrorist after they breach the anti-ESP detention center in "Tokyo Girls War".
Other
Flamethrower Arms
A ESP terrorist working for the Professor uses a couple of robotic Flamethrower arms in "White Girl".