Origin of gas-operated
Examples from the Web for gas-operated
The Skoda gun, some of which type are used in Japan and China, is loaded by a hopper feed, and is gas-operated.
It is a gas-operated gun, something like the Colt, and it is air-cooled.Inventions of the Great War|A. Russell (Alexander Russell) Bond
This gun is of a heavy type, air-cooled, gas-operated, and fed from either a strip holding 30 cartridges or a metallic link belt.America's Munitions 1917-1918|Benedict Crowell