At least 50 arms company employees had passes for Ministry of Defence premises this year, allowing them privileged access to Whitehall.
An Italian arms multinational has received more than £6 million from the Scottish Government, which has also given money to other arms firms.
Public sector workers will be "shocked and appalled" to learn of the arms industry investments, say critics.
28 firms from Scotland due to attend an arms fair dubbed a “festival of violence” - including a US arms giant with a factory in Fife.
Critics of the arms trade will appeal a High Court decision which allows the UK Government to continue exporting arms to Saudi Arabia.
School children are being encouraged to sell weapons in lessons branded “immoral”.
An SNP MP who criticised UK arms sales to Saudi Arabia has received more than £400 worth of hospitality from a defence lobby group.
Private arms and security firms with links to Scotland are working secretly with regimes accused of human rights abuses, it is claimed.
A US arms firm linked to alleged war crimes in Yemen has been condemned for a Fife school project making drones.