Unfortunately, my workplace does not allow a firearm to be on my side so…..
Near to me are dial calipers which would hurt like hell if used like an ice pick in someone’s throat or chest area, or eyeball. I do have a 30mm shell from an A-10 Warthog on my desk. Other than that, I’d stamp them to death with my inspector stamp.
Plus, I could simply beat the unholy shit outta somebody with my hands.