The machine-gun was a game-changing weapon of mass destruction ... In the battlefield conditions of WW1 this meant an average of 500 rounds a minute with a range of over 3,000 yards or 2,743m.

Planes were a very new invention, they were rare and fragile. But when World War One started they became weapons. Pilots could spy on enemy targets and the first bombs were dropped from the air.

After creating the “Gun that Won the West”—the Winchester Model 1873 rifle—they had a new task: manufacturing guns that could help win World War I. At this indoor range, men—perhaps ...