Horrible bosses are a dime a dozen, but in certain industries, hiring responsible managers is a matter of life and death. When u/Burnandmurder and their coworkers noticed that a couple of their bosses had a habit of getting wasted on the job, they knew they had to do something about it. In OP's line of work, being sober and attentive is of the utmost importance. At first, OP's coworkers didn't have a plan for how they were going to bust their bosses. They needed proof. But then one day, the bosses royally screwed up and gave their employees all the proof they needed.
Despite declining to name the company for legal reasons, u/Burnandmurder did update the post with more details about the sort of work they do. "I work in the firearms industry. We handle loaded and unloaded firearms as a rule rather than the exception. Safety is important."
In an updated edit to the post, u/Burnandmurder went into additional detail about "the incident" and how their drunk bosses put people's lives in danger.
"We have green and red zones. Green=firearms, ammunition, and loaded firearms are allowed, red=unloaded firearms only absolutely no ammunition under any circumstances. Both are marked by ample signage. Drunk bosses handled a loaded firearm in a red zone, had an ND [negligent discharge] which passed through an interior wall, exiting 3 inches from my coworkers hip and continuing into an open area where a local youth sporting team was...before embedding itself in a cinder block wall."
Negligent bosses are annoying at best and dangerous or abusive at worst. The comment section was full of supportive messages and similar stories.
Some pointed out that OP might have even done their bosses a favor. "Not only that," u/imgrandojjo added, "he probably saved his ex-bosses from going to jail for negligent homicide."
Another redditor mentioned that getting fired might not be the end of their punishment. "Depending on the circumstances and any evidence," u/IronJarl83 noted, "perhaps some manner of DUI or reckless endangerment is possible for criminal charges. Maybe a civil suit could be possible instead, an extra layer of sticking it to those assholes."