Weapons manufacturing is one of if not the largest industry that exists today. One of the odd facts of todays weapons and weapon systems all that I can think of depend on componants made in other countries. Often in the very country they may one day be used against.
I do not know of any country that manufactures their own weapons today. the governments simply request a product. An engineer someplace designs it, sells his idea to a manufacturer who then tries to get a lucrative government contract to make it. the sub-components are often from many separate manufacturers from all around the world.
It really is not a country that sells any weapons, it is an independent business that does. They seldom care about the result, as long as the finished product is being sold to a place far away.
Although there may be some people that believe they are being ruled by the leader of the country they live in, the real truth is we are all being ruled by the corporate heads of big business. If somebody has a product that can make a profit for a mass distributer, it will be on the store shelfs world wide, no matter who makes it or what country it is produced in.
Some business man found a market for surplus US weapons and has managed to find the means of getting the US Government to supply the money so that Saudi and Israel can buy the products from him. It is not the case of any government making an arms deal, it is the case of a scrap metal dealer getting rich off of Saud, Israel and the US.
Just my opinion from reflecting upon the arms industry in the world.
Someday check out the Krupp family on Google. But, keep in mind they are just a small part of the arms industry.