How would a fake gun make the sounds? Guess you could add in editing afterwards but the cleanest, easiest and most realistic would always be to use a real gun with blanks I would have thought. But I’m not a movie producer, so idk
Could also be that even if you’re able to get similar quality gun shots off a fake gun, it would cost a lot more in production etc
I don’t actually know how they do it in movies but from this one example I’m assuming it was industry standard but I could be wrong.
Other movies might do what you said e.g. airsoft gun or fake gun, with edited sounds later
I do find it hard to believe the industry standard is to use real guns with blanks but it may be that way. It’s a lot simpler, but obviously more dangerous
And yes guns are very loud, after a gun goes off beside you, you will have a sort of numbing in your ear for a few seconds and you can’t hear anything out of it lol