HUNTSVILLE, Ala. — BAE Systems is moving most of its production of howitzers and recovery vehicles to other locations in order to make room at its York, Pennsylvania, facility to build new Armored Multi-Purpose Vehicles and Amphibious Combat Vehicles , according to a company executive. “Our biggest program is kind of AMPV right now,” Jim Miller, vice president of business development for combat mission systems, said at the Association of the U.S. Army’s Global Force Symposium, taking place