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World's longest sniper kill - 2.47km twice! Mike Hanlon May 5, 2010. View gallery - 44 images. The sniper is without doubt the most feared combatant in any theater of war, the best of whom have an array of skills far beyond simply being able to hit human targets at a distance.
1 Chris Kyle was the most successful sniper in American military history. 2  He claimed 255 lives during four tours of Iraq before retiring in 2009. 3  His life is the subject of a new film tipped for success at the Oscars.  In 2013 Kyle was shot and killed by a friend at a shooting range in Texas.