13 Rules of Gunfighting. Credit goes to CJ Grisham, an soldier of 17 years. I only made minor edits. www.businessinsider.com/cj-grishams-1... Feel free to add r 13 Rules of Gunfighting Credit goes to CJ Grisham an soldier 17 years I only made minor edits www businessinsider com/cj-grishams-1 Feel free add r