BAY ST. LOUIS, Miss. - MAC LLC may be a young company, but it's already part of a select group of some two dozen contractors nationwide working on technologies the Department of Defense considers critical for national security. In this case, it's lightweight, small-caliber ammunition that will not only allow troops to carry more into battle, but also has a higher muzzle velocity and is more accurate than conventional rounds. (Source: Alliance Insight, April 2009)