Firearms 42 History 38 Gun control 13 Machine guns 13 Pistols 13 Artillery 10 Ordnance 10 World War, 1939-1945 10 Campaigns 9 Weapon systems 8 Rifles 7 Antitank guns 6 Guns 6 Shotguns 6 Airplanes, Military 5 Firearms ownership 5 Equipment and supplies 4 Identification 4 Pictorial works 4 Politics and government 4 Submachine guns 4 Violence 4 Aerial operations 3 Armament 3 Assault weapons 3 Design and construction 3 Gunsmithing 3 Juvenile literature 3 Military weapons 3 Revolvers 3