You do realize that if your employer tells you to do something illegal and you do it, your still at fault?Still missing how this works on a movie set. You do what you are told and don't do anything that isn't within what you are told with the firearm. This isn't about being a gun guy or not. If you, a gun guy, were handed a firearm on set, told to do xyz with it, you aren't inspecting it to determine what sorts of loads are in it b/c of your knowledge of firearms, that's not in your role nor is it allowed from what I can find, that's the armorers job. If you go outside of what you are told to do or don't follow the portion of the safety rules pertaining to what you should do/shouldn't do with a firearm prop while working on a scene, then yes, you screwed up and are part of it. AB's beliefs about 2A and firearms have gotten tangled (of course, it's BITOG) with a workplace safety incident that resulted in a fatality b/c more than one person(s) did not follow procedures w/r to prop firearms that were set forth to ensure that didn't happen. A root-cause analysis would likely point back to the fact that live ammo was allowed on set (and whoever allowed that) and unknowingly loaded into a prop firearm, not that the actor pointed the gun at the a camera and pulled the hammer/trigger that was part of the scene and what he was told to do. From what I can tell, beyond what I posted above showing some rules surrounding firearms for movies/plays, the actor doesn't do much here w/r to the inspection of the firearms, loading, etc. If AB was also part of the management that allowed knowingly safety rules to be violated, on that he would also be accountable as he should be like in any other workplace fatality.
Your argument is not justification. Who cares if its the armorers job. This is why pilots have pre-flight checks, and truck drivers inspect there rigs before getting in, etc.