I'd say thats okay, because thats what the story refers to it as.

If someone wanted to know which Beretta Saul/Riley/Gatekeeper/whoever was talking about, they could come to the wiki, click on where it says Beretta, and then the page itself would say that it was a pistol, be it an M9 or a 92 or whatever. If you have two different pages for example, someone with no experience of guns wouldn't know which to click on.

That's the way I see it anyway.