- (of a firearm) using some of the exhaust gases to operate the action.
Origin of gas-operated
First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for 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
The Skoda gun, some of which type are used in Japan and China, is loaded by a hopper feed, and is gas-operated.
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