Most of them were from the city, I figured, and as such never spent much time around guns and never joined the military. So how would they know?
But then I came to the realization that the supposed lack of knowledge about guns may be true on a personal level for most reporters, but that wasn't why they so regularly got their reporting about guns and the uses of a firearm wrong. These news agencies have investigative staff who spend a lot of time researching issues for reporters and broadcasters who are trying to learn more about a subject; so there's no excuse for them not to know about something as common as a firearm.
So it had to be something else, and I believe it is: Anti-Second Amendment bias. That helps explain why, before the bodies are even cold, the American Pravda media goes all-out to demonize firearms and intentionally misinform readers and viewers after every mass shooting.