A radar funded by Scottish Enterprise was marketed to countries with poor records on human rights at one of the world's largest arms fairs.
American multinationals Raytheon and Lockheed Martin are bidding for a lucrative Ministry of Defence training contract at Faslane.
Arms firms supplying weapons for the war in Yemen that has killed 70,000 people were handed nearly £3m by the Scottish Government last year.
Bombs made by arms multi-national Raytheon has been linked to war crimes in Yemen, but the company did not speak to investigating MPs.
Leonardo, an Italian arms firm linked to ethnic cleansing in Syria, has visited Scottish schools at least 17 times over the last two years.
BAE Systems has visited more than 400 schools across the UK and produced lessons for children.