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What recoil? They are shooting blanks. There is no mass leaving the gun. If you want to cycle the gun on trigger pull in a realistic yet safe way, compressed CO2 can be used. Some movie guns are even electrically/magnetically actuated.
I mean 5-10 grams of vaporized gunpowder leaves the barrel at fairly high speed. It's not a lead round but it's not nothing. Also the spent brass being ejected is not easy to CGI convincingly.
Good points. The gun would have to cycle with CO2 or magnets and feed from a magazine empty casings so that the ejector continues to do its job.
Yet so many movies just add the sound of casings hitting the ground so I wonder if the hassle is worth it except for some specific shots. I enjoy the realism but I'd rather people not put their lives needlessly at risk.
You do know how physics works, right? There is an explosion in the chamber that moves the slide/bolt backward to rack another round of course there will be recoil. Have you ever fired a black powder gun with no bullet in it? There is still a recoil.
And an ejection of hot gas from the muzzle. That has mass.
Not as much as your mother.
I've fired a lot of blanks in my life. The recoil is nowhere near a live round.
But there is still more than enough for a movie.
Then a compressed air system will work too.
I agree. Anything that can be done to make it safer while also being a practical effect that looks good should be done. I get that as an actor, they sometimes want to feel the weight of a gun to get into the role, but safety should always be the number 1 priority.
They put a choke on a barrel so automatics can work.