It was pretty disappointing that the gun models in P5 only cycle between a couple styles each.
It was still a cool aesthetic part of P5, but they could have leaned into the model-gun otaku aspect a lot harder. Some of the item descriptions that reference real aspects seem to get the country, era, or something wrong. The text doesn't always match the model.
It is cool and would be cool, that when Joker is described as using an eastern-bloc manufactured pistol that was manufactured decades before P5 takes place and is a copy of a pistol designed decades before in the USSR and has a reputation in decades of Japanese media as a typical Yakuza pistol because for as many decades or more it was a typical yakuza pistol, it actually looks like said pistol.
Same for when he is supposed to be using an American (Isreali) weapon that is super popular in western (north american or otherwise) pop-culture (comics, movies, tv shows, albums, video games, ect.) despite having no actual service history in both the police and the military. The majority of players are going to recognize it, and even have some semblance of what firing one is like even if they have never actually fired one or seen one fired in real life before.

tl;dr: Elly will have access to a level-action rifle in P1: Rest