|The following is based on Fallout Tactics and some details might contradict canon.|
A gas-operated machine gun chambered for .303 ammunition, the Lewis gun was originally invented by US Army Colonel Isaac Newton Lewis in 1911 and entered service with the British Army. It was used until the 1940s, its popularity ensured by its low weight (less than a half of the weight of a typical medium machine gun in the same class), efficiency, and reliability.
- The Lewis MKII can not be found in the campaign. It is only available in multiplayer matches.
- Item description: "Lewis MKII"
"Invented by an American, the .303 Cal Lewis Gun was adopted by the British Army during WW 1 and remained in service with allied forces until well into the 1940's. An efficient and reliable weapon. ."