The biggest change in the 2011-2015 Stockholm International Peace Research Institute (SIPRI) list of top arms exporters is China – which is rapidly becoming a big exporter of weapons. Though Britain's share of the world market grew about 10 percent, the aggressive growth of China's exports bumped the Brits down to No. 6. In descending order, here are the remaining countries in the top 20: Spain, Italy, Ukraine, Netherlands, Israel, Sweden, Canada. Switzerland, South Korea, Turkey, Norway, Belarus, South Africa and Australia.