My 16 year old son is in the local Police Explorer program. This week they had an active shooter training...he came home with a shot from an air soft gun right in his throat. He laughingly said,”Trigger finger Brittney”(girl in the program) was role playing an officer. He was the victim-ran out yelling help me, help and she shot him immediately. Good thing it was air soft guns!!
I can not imagine why real weapons would be used in any kind of training or demonstration. The chances of things not going perfectly are always high.
I have a Walther P99 airsoft gun. It feels and operates almost exactly like the real thing (without the sound). The slide even cycles when it is fired. If you want realistic simulations, you use something like that. Of course, as others have stated every single actual firearm and round needs to be removed from the scene first, before you do anything.