布萊德利·庫珀/ 西耶娜·米勒/ 凱爾·加爾納/ 盧克·葛萊姆斯/ 傑克·麥克道曼/ 瑪內特·帕特森/ 艾瑞克·克羅斯/布萊恩·哈利塞/ 山姆·賈格/ 吉爾·奧唐奈/ 科里·哈德里克/ 埃里克·拉丁/ 納維德·內加班/ Joel Lambert / 阿薩夫·科恩
Growing up in Texas, Chris Kyle is taught by his father how to shoot a rifle and hunt deer. Years later, Kyle has become a ranch hand and rodeo cowboy, and returns home early, to find his girlfriend in bed with another man. After telling her to leave, he is mulling it over with his brother when he sees news coverage of the 1998 US embassy bombings and decides to enlist in the Navy. He qualifies for special training and becomes a US Navy SEALs sniper.
Kyle meets Taya Studebaker at a bar, and the two soon marry. He is sent to Iraq after the September 11 attacks. His first kills are a woman and boy who attacked US Marines with a Russian made RKG-3 anti-tank grenade. Kyle is visibly upset by the experience but later earns the nickname "Legend" for his many kills. Assigned to hunt for the al-Qaeda leader, Abu Musab al-Zarqawi, Kyle interrogates a family whose father offers to lead the SEALs to "The Butcher ", al-Zarqawi's second-in-command. The plan goes awry when The Butcher captures the father and his son, killing them while Kyle is pinned down by a sniper using a Romanian PSL sniper rifle. This sniper goes by the name Mustafa and is an Olympic Games medalist from Syria. Meanwhile, the insurgents issue a bounty on Kyle.