Sweden supply nations world wide with weapons, including the UK and USA
Even Volvo and Saab makes weapons and parts for weapons in the USA. Bofors is a Swedish company owned by United Defense. Saab and Volvo are completely Swedish companys though. As well as ATLAS (they changed their name i think)
Swedish manufactures are working togather with the American companys in developing high-tech weapons for the US military, as we have no use for it heh.
Finland is good at producing weapons and systems as well! We buy material and systems from them that we use in Kosovo, Bosnia, Congos etc

High quality stuff.
Sweden is also the first to develop a true stealth ship

Called Visby which will be in service this year
USA and UK use our weapons in Iraq and Afghanistan. As well as sights for weapons which is produced by a Swedish company. UK used our anti artillery radar in Iraq.
Good way for us to test our equip in real war conditions.