First, you have no idea the gun was certified. If you do, present it. Second, *any* liability ultimately ends with the handler. Any windy explanation about the gun, rather than Baldwin's reckless conduct is an attempt to impress yourself.
The rule in Hollywood is never point a gun at ANYONE - ANYTIME. Everything is handled in post and angles!
Perhaps the closest to a list of suggested rules is that published by the Industry-Wide Labor-Management Safety Committee.
Its advice includes:
Blanks can kill. Treat all firearms as though they are loaded
Refrain from pointing a firearm at yourself or anyone else
Never place your finger on the trigger unless you’re ready to shoot
Anyone involved in using a firearm must be thoroughly briefed at an on-set safety meeting
Only a qualified person should load a firearm
Protective shields, eye and hearing protection should be used by anyone in close proximity or the line of fire
Any actor who is required to stand near the line of fire should be allowed to witness the loading of the firearms