Should employees be aloud to bring firearms for self defense IF the customers are also allowed to carry firearms?

I work as a stocker in walmart lol I often see many customers carrying firearms on their hips or belts and at most times makes me believe at Anytime if a coworker were to be held at gunpoint at the cash register or anywhere, or a customer decided to pull their weapon to fire and no police were near by, there would be absolutely nothing we could do about it it's just open season for the customers and us at that point. Now I know their Avoid Deny Defend procedure is supposed to be a guide for us in this scenario and based on their guidance we are supposed to run if we can call police or if we can't do that we can attack the gunman but let's be serious here the second the gun goes off you're dead or close to it and the closest thing to a weapon you'll ever be around is just not enough to actually defend yourself from a shooter. Honestly I think every business should give you some sort of bullet proof vest now a days

But what do you think? Should employees be allowed to carry concealed if the customers are also allowed to be in the building carrying concealed?
Should employees be aloud to bring firearms for self defense IF the customers are also allowed to carry firearms?
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