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Gas-operated reloading

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How Does it Work: Blowback Action

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Bolt Gun Vs Gas Gun | Sniper Shooting Comparison | Tactical Rifleman

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American Gas-Operated Mounted Machine Guns

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The First Gas Operated Semi-Auto Pistol - Wildey .45 Win Mag

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The Sure Shot - Recoil vs Gas operated Shotgun

Gas-operation is a system of operation used to provide energy to operate locked breech, autoloading firearms. In gas operation, a portion of high-pressure gas from the cartridge being fired is used to power a mechanism to dispose of the spent case and insert a new cartridge into the chamber. Energy from the gas is harnessed through either a port in the barrel or a trap at the muzzle. This high-pressure gas impinges on a surface such as a piston head to provide motion for unlocking of the action, extraction of the spent case, ejection, cocking of the hammer or striker, chambering of a fresh cartridge, and locking of the action. The first gas-operated rifle was designed in 1883-1884 by Karel Krnka.
    • Gas systems 

    • Types 

    • Gas assist systems