Using gas blowback airsoft models when other people are involved is still plenty authentic enough these days, especially because muzzle flash and smoke is easily added in post at this point if it’s even required.

Modifying for allowing for dry fire is probably not terribly hard to do.

Heck, they’re probably also easier to get exotic designs made for one-off props, too.

As a casual gun enthusiast. I really don’t understand the motivation to use real firearms on movie sets.