Thrasher, 19, beat silver medalist Du Li of China in the final round with a total of 208, setting an Olympic record in the finals. Du finished with 207.
The West Virginia native, Thrasher, is an NCAA champion competing in her first Olympics. She wasn’t the favorite going in as Du won gold in 2004.
Serbian shooter Andrea Arsovic is ranked No. 1 in the world and failed to advance to the final. Yi won Olympic gold in the 2012 London Games.