50-caliber machine gun, aka “Ma Deuce.” The Corps is getting an upgraded version of the beast, called the M2A1. Finally! It’s only been six years since the Army started getting the M2A1 back ...

PICATINNY ARSENAL, N.J. (Nov. 30, 2012) -- The U.S. Army recently announced that the M2A1 .50 Caliber Machine Gun was among its top 10 "Army Greatest Inventions" for the 2011 calendar year.