Beast

The Beast is an enemy clad in heavy armor and armed with a Barnstormer. Booker DeWitt encounters them in Columbia during the course of BioShock Infinite.

Overview
Due to their armored bodies, they can fire RPG rounds at close quarters without taking damage. These enemies should be dispatched at a distance to avoid incoming rockets and nail them with headshots. After their helmet is removed, strafe their rockets and aim for the head.