Complex sentence: It was previously expected that the missile system would be tested in the fall of 2013, but testing is now expected to be completed in 2014, with mass production beginning in 2015, and deliveries to the Russian Military in 2016.
Split into simpler sentences: It was previously expected that the missile system would be tested in the fall of 2013, but testing is now expected to be completed in 2014. Mass production is expected to begin in 2015, and deliveries to the Russian Military are expected in 2016.