You can tell the amateurs from the pros

By how they hold their guns.  Watching TV clips from Syria, with young Arab guys showing off, firing light machine guns from the hip.  Looks cool and all, but anyone with actual shooting experience knows that you have to aim the gun in order to hit anything.  I learned that when I was 12 years old, shooting 22 rimfire at summer camp.  I guess they don't have summer camp in Syria.