There are a few movies that stand out when I think of tactically legitimacy on the screen. Of course “John Wick” and its sequel will always stand out, but — despite Keanu Reeves’ awesome display of firearm proficiency — they aren’t necessarily meant to be 100% realistic, they’re meant to be awesome and entertaining. Which they most definitely are.
However, some movies have a different purpose in mind: to imitate realism. That often means mishandling weapons for the actor playing a lay person who doesn’t know what they’re doing, but it also means competency from say, a trained hitman character or a supposed ex-Navy SEAL. Every once in a while, the actor is properly trained and does justice to those roles.
As usual, I don’t recommend watching any of these unless you’ve seen the whole movie. These aren’t in any particular order, though the first one almost always comes to mind when I think of this sort of thing.