During our ongoing audit of DHS law enforcement virtual training, we learned that the Coast Guard uses functional firearms to conduct DVD-based simulation training. We identified this issue in Coast Guard’s Commandant Instruction 3574.5C, 18 September 2014, Coast Guard Judgmental Use of Force Evaluation and observed a demonstration of this training at one Coast Guard location. According to testimony or policy from four other DHS components that employ or train law enforcement personnel, the use of functional firearms during video-based simulation training is prohibited within their respective components. By using functional firearms capable of firing ammunition, even if emptied of ammunition, in DVD-based simulation training, Coast Guard increased the risk of unintentional injury or death. Coast Guard concurred with our recommendation and took immediate corrective actions to discontinue the use of functional firearms during DVD-based simulation training. The recommendation is resolved and closed.