The Beretta 92FS is used by the Black Scissors enforcers. Most noteably in the opening of the first episode, where every member of the Black Scissors draws a Beretta 92F and opens fire at Mikura.
The Beretta makes another appearance during Episode 10. In the hands of one of the highjackers.
In Episode 1, Mikura carries a Franchi SPAS-12 shotgun when the DSA team goes after Asano. She first uses the gun to blast the locks off the door to Asano's apartment. Then later against Asano himself, using the weapon to supress and destroy his cover. Sadly, her SPAS-12 is never seen again.
After being pinned down by Mikura's shotgun fire, Asano retaliates with an M16A1 fitted with a M203 grenade launcher. He never fires the rifle itself, instead launching a 40mm grenade at Mikura and company.
In Episode 3, a former client attacks Mikura and Harada with a Heckler & Koch MP5K fitted with a 15-round magazine. Mikura manages to disarm the former client and takes his MP5K for herself.
The MP5K appears again in Episode 10, in the hands of some of the hijackers.
Mikura carries this gun when she tries to infilrate a gang's hideout in episode 7. She draws it when her cover is blown, but quickly finds herself outgunned when the leader of the gangsters grabs a sub-machine gun.
(Can someone help me identify this, please? I honestly have no idea what this gun is.) [answer: double barrel derringer]
The gangster boss in Episode 7, uses a Steyr TMP when Mikura's cover is blown. Another Steyr TMP is seen with a silencer when the gangsters chase Mikura into the alley.
Some of the highjackers in Episode 10 are also using Steyr TMPs.
Kazuto uses what appears to be a H&K PSG1 at the end of Episode 1 and the beginning of Episode 2. He attempts to assassinate Kurokawa with it, but is thwarted by Mikura. He makes another attempt in Episode 3, but backs out when he's spotted by Asami.
Note that the PSG-1 is far too expensive for actual field use.
