The Lewis gun is a First World War–era light machine gun. Designed privately in the United States though not adopted there, the design was finalised and mass-produced in the United Kingdom, and widely used by troops of the British Empire during the war. It had a distinctive barrel cooling shroud and top-mounted pan magazine. The Lewis served to the end of the Korean War, and was widely used as an aircraft machine gun during both World Wars, almost always with the cooling shroud removed, as air flow during flight offered sufficient cooling.
A Lewis gun at the Elgin Military Museum Canada. The rear end of its light-gray finned aluminum heat sink, which fits within the gun's brass-colored cylindrical cooling shroud, can be seen
Men of the 28th Battalion of the 2nd Australian Division practising Lewis gun drill at Renescure.
Lewis Gun Manual used by Sgt. Don L. Palmer of the 25th Aero Squadron.
Australian soldiers firing at enemy aircraft during the First World War
A light machine gun (LMG) is a light-weight machine gun designed to be operated by a single infantryman, with or without an assistant, as an infantry support weapon. LMGs firing cartridges of the same caliber as the other riflemen of the same combat unit are often referred to as squad automatic weapons.
The Belgian Minimi M249 light machine gun, one of the most widespread modern 5.56 mm light machine guns amongst NATO countries. This one is an M249E3 "Para" model.
IWI Negev of the Israeli Army
Bren light machine gun
.30-06 Browning Automatic Rifle Model 1918