, MBT, M1A1, Tank M1A1 Abrams main battle tank crew loading rounds during a live fire exercise. M1A1 is armed with a 120 mm L, 44 M256A1 smoothbore gun, carrying 40 rounds. Footage is from marine training conducted in Kuwait s Camp Arifjan In M1A1, ammunition is stored in directly opposite of the barrel loading mechanism and is loaded manually