U.S. Marines show an M2 .50 caliber machine gun to a visitor during Marine Day in Times Square, New York, May 23, 2009. The weapon is most commonly used as a turret gun for Humvees and can be mounted on some of the Marine Corps helicopters. The Marines are assigned to the Special Purpose Marine Air Ground Task Force New York. U.S. Marines show an M2 .50 caliber machine gun to a visitor during Marine Day in Times Square, New York, May 23, 2009. The weapon is most commonly used as a turret gun for Humvees and can be mounted on some of the Marine Corps helicopters. The Marines are assigned to the Special Purpose Marine Air Ground Task Force New York. SHARE: Download: Full Size (6.56 MB) Tags: Photo Essays Credit: VIRIN: 108996-H-VYG93-335.jpg Photo Gallery