The JLTV (Oshkosh Defense) As the U.S. Army readies to bring its current crop of Humvees into the 21st century with a new vehicle, reconnaissance officials are also looking to replace the Humvee's pre-World War II .50-caliber machine gun with a version of the Apache helicopter’s cannon in 2019. The Army has embarked on a major project to replace the Humvee, officially known as the High Mobility Multipurpose Wheeled Vehicle (HMMWVS). Last year the Army signed a $6.7 billion deal with Oshkosh Defense for 17,000 Joint Light Tactical Vehicles (JLTVs). Touted as offering more protection and greater off-road mobility, JLTVs...