The first mechanical firing mechanism, the matchlock, was developed
The first gun designed with a buttstock allowing it to be fired from the shoulder was the harquebus
Guns had already been the decisive factor in several battles between Spain and France.
The first machine gun, the mitrailleuse, was designed in Belgium
Dr. Richard J. Gatling patented a gun with six barrels that rotated around a central axis by a hand crank.
Hiram S. Maxim, an American engineer, patented the first automatic machine gun
John M. Browning introduced the principle of gas operation.
The army authorized a regimental machine-gun company.
American ordnance officers replaced the Browning .30 caliber guns with the new M60.