Monster (2004-2005) is a 74-episode anime series based on Naoki Urasawa's manga of the same name. The story follows Dr. Kenzo Tenma, a brilliant neurosurgeon who discovered that the young boy named Johan who he saved years ago has turned into a criminal mastermind responsible for a series of brutal murders. As he tries to track down Johan himself, he is also trying to evade the police, particularly an obsessive BKA inspector who believes Tenma is the true perpetrator. The story takes place across various parts of Germany and Czech Republic.
The following weapons were used in the anime series Monster:
Dr. Kenzo Tenma uses the Beretta 92FS as his main sidearm which he favored during his firearms training. Johan Liebert, Milan Koláš and a neo-Nazi member are also seen using Beretta 92Fs.
Walther PPK
Nina Fortner/Anna Liebert uses the Walther PPK as her main sidearm. BKA Inspector Heinrich Lunge carries two Walther PPKs (instead of the Walther P5 and PP in the manga), with one in an ankle holster as a backup weapon. All German police officers in the series are armed with Walther PPKs. Various other characters are also seen with Walther PPKs.
SIG-Sauer P228
Roberto uses a SIG-Sauer P228 as his main sidearm. He later gives a spare one to Eva Heinemann. Tenma comes into possession of Roberto's P228 and used it at the Munich University library. One is also seen lying on a table during Tenma's firearms training.
COP 357 Derringer
Nina uses the COP 357 Derringer as a backup weapon which she later gives to former detective Michael Müller.
Steyr GB
Wolfgang Grimmer takes Detective Jan Suk's Steyr GB to defend both of them. Seen also in the hands of the Czech police and former StB agents.
CZ 75
Czech police and former StB agents are seen with the CZ 75 "Pre-B" pistols as their main sidearm. Tenma comes into possession of one which becomes his main sidearm in the later half of the series. Johan is also seen using a CZ 75 "First Model".
Heckler & Koch P7M13
Martin Reest is given a Heckler & Koch P7M13 for a job. Eva purchases a P7 for herself later in the series.
Walther P99
Henning Heinich, a Ruhenheim residence purchases a Walther P99 for protection. Grimmer later takes it to defend the townspeople. Klaus Poppe/Franz Bonaparta uses it when he confront Johan.
Browning Hi-Power
Roberto's thugs use Browning Hi-Power pistols. Nina picks one up from a dead thug and uses it as well.
Tokarev TT-33
A Tokarev TT-33 is seen lying on a table during Tenma's firearms training. A variety of TT-33s are distributed to the Ruhenheim townspeople and seen in use by various minor characters.
Beretta 93R
One of Petr Čapek's thugs used a Beretta 93R when trying to eliminate Eva.
The Walther P38 is seen in the flashback of a former Nazi Kriminalpolizei.
Submachine Guns
Heckler & Koch MP5K
Several Heckler & Koch MP5K submachine guns are used by neo-Nazis and terrorists.
IMI Uzi / MP2A1
Several German police officers are armed with MP2A1 submachine guns when escorting the prisoners onto the transport van.
Rifles
Norinco Type 56
A Norinco Type 56 is seen in the flashback of Hugo Bernhardt.
M1 Carbine
Henning also purchases a M1 Carbine for protection. Inspector Lunge borrows the carbine soon after.
Mauser SR-93
Tenma purchases a Mauser SR-93 from the underground gun runner in an attempt to assassinate Johan. The gun runner states that the rifle failed the German Army selection (presumably the G22 trial) and it is chambered for .338 Lapua rounds. Roberto briefly acquired the rifle from Tenma but wasn't able to use it.
SSG 82
Herr Rosso's flashback shows him revealing an East German SSG 82 sniper rifle during an assassination attempt. A former StB agent also used an SSG 82 against Grimmer and Detective Suk.