Well apparently BoA isn't the first bank that asked a business to leave because they deal with firearms.
Who here knows of CDNN? Here's their website for those that don't.
http://www.cdnninvestments.com/ Basically they are a massive company that sells guns, and accessories all over the US. Citi Bank did the same thing to CDNN a few years ago that BoA just did to McMillan because they sell guns to civilians.
http://lmgtfy.com/?q=citibank+cdnn+sports