--- title: "This is why no one uses water-cooled machine guns anymore" description: "A water cooled machine gun, as it turned out, required water to cool it. The more you used them, the more they needed that water changed." date: "2022-06-10" modified: "2023-01-02" authors: - name: "Blake Stilwell" job_title: "Editor-In-Chief, Air Force Veteran" link: "https://www.wearethemighty.com/authors/blake/" url: "https://www.wearethemighty.com/popular/water-cooled-machine-guns/" categories: - "History" - "Tactical" - "Weapons" --- # This is why no one uses water-cooled machine guns anymore ![]() It was a common sight in [World War I]() – the image of a machine gun spewing bullets from a barrel protruding from what looks like a giant canister. That canister is a healthy indication that the barrel of the machine gun in question is being cooled by water in the canister and that the water will soon be as hot as the barrel. For the troops who wanted to continue using the machine guns to keep wave after wave of enemy troops in their own trenches and not coming into yours and sweeping you all out with shotguns, this was going to become very important, very fast. ![water-cooled machine guns]() *"The Kaiser says this will not be a problem!" The Kaiser was wrong.* Water-cooled machine guns, as it turned out, required water to cool them. And the more you used them, the more they needed that water changed out. This may not have been terribly difficult during World War I, when movement along the front was restricted to just crossing no man's land into the next series of trenches a hundred yards away. Unfortunately for everyone's infantrymen, the water-cooled MG lived well past the Great War. So, the infantry were stuck hauling water for the guns, well into the Korean War. But eventually, the guns were replaced with the less efficient but more manageable air-cooled guns. The problem with those was the barrels did not disburse heat quite as well as water-cooled weapons. So if a gunner isn't shooting in bursts to prevent overheating, there is a chance the barrel could melt or become deformed during use. The solution? Interchangeable barrels. Watch U.S. troops do it: https://www.youtube.com/watch?v=fkW4a9Edg2Q That video is sixteen seconds long. So as efficient as water cooling those barrels really is, asking machine gunners to carry the weapon, its ammo, and tanks of water on a journey to [Mordor]() is just not as effective as swapping out the actual problem: the barrel. ## Author Blake Stilwell is We Are The Mighty's Editor-in-Chief, covering military news, entertainment, and history, along with veteran education, employment and entrepreneurship. He is a former U.S. Air Force combat cameraman with degrees in Graphic Design, Television and Film, International Relations, Public Relations, Business Management and Middle Eastern Affairs. After leaving the military, he began working in film and television production in New York and Los Angeles, work that included ABC News, NBC Olympics, and HBO Sports. He then spent two years in Washington with White House Communications, before joining the Near East Foundation. At NEF he served as an International Development Fellow, then Communications Officer, and finally, Media Officer for the Middle East and Africa. Based in the Palestinian Territory, he coordinated strategic communications between eight country offices, international media, and government and NGO partners. He began a career focused on writing and editing in 2015 with We Are The Mighty. He left in 2019 for Military.com, but returned as Editor-in-Chief in 2025. Blake’s work has been seen on CBS News, Fox News, CBC, The Chicago Tribune, Task & Purpose, Military Times, Recoil, Skillset, American History, and was shockingly even used in a Supreme Court argument. He is an avid traveler and small business owner in Ohio, where he spends most of his energy fixing up a very old house. ### Author social links [Facebook]() [Twitter]() [Instagram]() [LinkedIn]()