Depending on how it is quantified, by dollars, or tonnage, it goes back and forth between the US and Russia, with China’s weapons exports growing fast.
http://en.wikipedia.org/wiki/Arms_industry#World.27s_largest_arms_exporters
Crazy combat footage from Ilovaisk as “Motorola’s” unit clears the railroad station from the trapped Right-Sector Militia, I believe.
These are veterans of Slovyansk, commanded by a Slovyansk local. They are used as a “Fire Brigade”, and go where the toughest fighting is.
http://youtu.be/dLT9Mif_y-o