Russia has seen its sales of arms and military equipment grow in recent years while sales from longstanding providers based in the United States and Western Europe continue to decline, according to a study released Monday by the Stockholm International Peace Research Institute (SIPRI). The study showed that in 2013 arms and military services sales came in at $402 billion, a decrease of two percent but not as much as the 2012 drop of 3.9 percent, SIPRI said. Russia’s increased…