RIN ~Daughters of Mnemosyne~ (expanded from the original Japanese title Mnemosyne) is a six episode anime series from Xebec and Ginco studios. The series is often mistaken for being an OVA due to its number of episodes and its explicitly violent and erotic content, but is in fact a television series made especially for AT-X, TV-Tokyo's satellite channel. The series was licensed and dubbed into English by Funimation Entertainment.
The following weapons were used in the anime series RIN ~Daughters of Mnemosyne~ :
The hitmen sent to kill Ruon in episode 4 carry Jericho 941 pistols.
Futuristic Handguns
Throughout episodes 4 (which takes place in 2025), 5 and 6 (both of which are set in 2055), various characters are seen using fictitious handguns, all of which have little screentime.
Submachine Guns
Mini Uzi
In episode 1, Sayara Yamanobe retrieves an IMI Mini Uzi from a wall safe while trying to escape the Aoyama Pharmaceutical research lab. The weapon's portrayal is inconsistent; some shots depicted as being stockless, others show it with a folding stock.
Heckler & Koch MP5/40
In episode 3, Yamanobe tries to kill Rin with a H&K MP5/40.
Futuristic SMGs
Two fictional submachine gun designs are seen in the later half of the series. The first is in episode 4 (set in 2025) when a group of commandos raid the Asōgi Consulting office using a submachine gun reminiscent of the Heckler & Koch MP7. The second is in episode 5 (set in 2050) when Laura (disguised as Rin wearing a Santa outfit) ambushes Rin at her office with a submachine gun aesthetically similar to the CTAR-21.
Rifles
M21 Sniper Rifle
In episode 2, Laura uses a M21 Sniper Rifle with a thumbhole stock, sound suppressor, bipod, and no scope.
Unknown Rifle
A Kudoru cultists uses an unknown rifle to kill the crew of a cargo ship in episode 3.
Futuristic Sniper Rifle
A commando sniper in episode 4 uses a fictional futuristic sniper rifle to shoot Tamotsu.
Other
Remington 870 Police Magnum
Episode 1 opens with Laura trying (and temporarily succeeding) to kill Rin with a Remington 870 Police Magnum.
RPG-7
The assassin in episode 2 also has a RPG-7 fitted with an electronic sight in his possession.
Shotgun Glove
Rin's preferred firearm is a specialized steel glove with slots to hold and fire up to three 12 gauge shotgun shells.