when was the first fully automatic gun made
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]
.45 ACP The .45 ACP (Automatic Colt Pistol), or .45 Auto (11.43Ã—23mm)[1] is a handgun cartridge designed by John Browning in 1905, for use in his prototype Colt semi-automatic pistol. After successful military trials, it was adopted as the standard chambering for Colt's M1911 pistol, being named .45 ACP.[2]