The beast of Omaha was Severloh who use both MG42 and the Kar98k at Omaha. He's even used AA fire to shoot after he ran out of regular ammo, catching the attention of an American Destroyer. He fired approx. 400 rounds from his Kar98k and managed to kill a total of around 1000-2000 American soldiers out of the 3000 in total killed at Omaha.