when did the first machine gun come out
Machine gun The first successful machine-gun designs were developed in the mid-19th century. The key characteristic of modern machine guns, their relatively high rate of fire and more importantly mechanical loading,[4] first appeared in the Model 1862 Gatling gun, which was adopted by the United States Navy. These weapons were still powered by hand; however, this changed with Hiram Maxim's idea of harnessing recoil energy to power reloading in his Maxim machine gun. Dr. Gatling also experimented with electric-motor-powered models; this externally powered machine reloading has seen use in modern weapons as well.
Automatic rifle The world's first automatic rifle was the Italian Cei-Rigotti. Introduced in 1900, these 6.5mm Carcano or 7.65×53mm gas-operated, selective-fire, carbines attracted considerable attention at the time.[1][2] They used 10-, 20- and 50-round box magazines.[2] The Cei-Rigotti had several failings, including frequent jams and erratic shooting.[2] In the end, no Army took an interest in the design and the rifle was abandoned before it could be further developed.[2]