The water-cooled heavy machine gun that saw WWI and WWII service in the US Army. Reliable and accurate, its water-cooling system allowed sustained fire but added significant weight and logistical complexity. Type: Machine Gun Action: Automatic Caliber: .30-06 Springfield Capacity: 250 Year introduced: 1917, USA Weight: 1056 oz Overall length: 46.5" Status: Discontinued Military use: Yes Intended use: Support, Defensive, Military