Hiram Maxim invented the first fully automatic machine gun in the world in 1884. The Maxim gun was recoil-operated and was cooled by a water jacket surrounding the barrel. It was manufactured by Vickers and was sometimes known as the Vickers-Maxim and sometimes just Vickers. These guns were used by every major power. Maxim’s first British patents relating to the development of the Maxim gun were granted in June and July 1883. The first prototype was demonstrated to invited guests in October 1884

History of Mary Maxim

Introduced by Sir Hiram Maxim in the 1880s, the water-cooled Maxim Gun was the first automatic machine gun. Its descendant, the PM M1910, now favored by Ukrainian fighters against Russian incursions, showcases enduring reliability and firepower. | Interesting Engineering

Maxim machine gun captured from russian positions.

Ukrainian Army Using The Maxim M1910 Machine Gun (Russia-Ukraine War)