U.S. Marine Corps Infantryman Shooting an m2 .50 Cal Machine gun t-shirt. Digitally Printed on soft superior 100% ring-spun Cotton, Triblend, 50/50 premium Soft Style Quality T-shirts. Not Slim Fit Size XXL is Heavy Cotton. M2 .50 Caliber Machine Gun, Heavy barrel is an automatic, recoil operated, air-cooled machine gun with adjustable headspace. The design consist of two marines shooting the m2 .50 Cal Machine Gun in front of the letters IN, Infantry with the U.S. Flag.