Or an old water cooled Browning .30 cal.
This one? All the rage up through Korea:
Wikipedia said:The Army Ordnance Department initially showed little interest in Browning's design, but after war was declared in April 1917, Browning was able to arrange a test. The first test was a success, but the Army demanded a second test a short time later. In the second test, Browning fired the weapon in two lengthy bursts of 20,000 rounds each without a single mishap. The Ordnance Board was impressed but was unconvinced that the same level of performance could be achieved in a production model. Browning produced a second weapon which he fired in a third test continuously for 48 minutes (over 21,000 rounds).[citation needed] Finally convinced, the Army adopted the weapon as its principal heavy machine gun, utilizing the M1906 .30-06 cartridge with a 150-grain, flat-base bullet.