The M1151 Enhanced Armament Carrier is an improved version of the standard Humvee (HMMWV) designed to replace the M1025A2 used by the United States Armed Forces as a response to United States Central Command requirements.The M1151 HMMWV has a heavier chassis and improved engine to handle add-on armor. It is built on an Expanded Capacity Vehicle chassis, which allows for more passengers or additional supplies (up to 2,300 lbs).