Gintama is an science-fiction comedy anime television series about a Samurai, Gintoki Sakata, who runs an all service enterprise (they do anything for money). The story takes place in a fictional Edo (ancient name for Tokyo) 20 years after aliens called the Amanto invaded Japan during the isolation of Japan.
The following weapons were used in the anime series Gintama:
Nickel Plated M1911A1
Matsudaira Katakuriko personal weapon is a Nickel Plated M1911.
Beretta 92FS (modified)
Heckler & Koch MP5K
One of the terrorist is armed with a MP5K.
The FAMAS bullpup assault rifle is seen held by many police guards of Bakufu (shogunate) when escorting a "serial killer prisoner member of the rebels". Historically, the real shogunate's elite troops (Denshutai) were equipped and trained by the French military.
Heckler & Koch G36E with M203 attachment
One of the terrorist is armed with a rifle that resemble little like the Galil ARM rifle with a wooden handguard.
One of the terrorist is armed with a AKMSU.