well this is a hypothetical question since I live in the UK.
Let's just say I'm calmer now but in my younger days if I'd had a gun at work I would have killed 50% of the workforce and then drove out to the most annoying customers of all time and shot them in the feet, knees, hands, groin and head so no having guns at work isn't a good idea
If the aim is to have a murder rate like the US then hell yeah give every worker an AK-47