... but wasn't sure if BUG had more than one common usage in firearms. Does BUG commonly refer to anything else?
Example of other acronyms that could mean multiple things: CDC
Center for Disease Control if you are a medical type.
Combat Direction Center if you've worked in operations on an aircraft carrier.
Climate Diagnostics Center if you work at NOAA.
Connected Device Configuration if you are a software engineer.
So how's that for a diverging thread?