Back Адвод парахавых газаў Byelorussian Газово-възвратен механизъм Bulgarian Gasdrucklader German Recarga accionada por gas Spanish Gas bidezko errekarga Basque بارگذاری مجدد با گاز باروت Persian Rechargement par emprunt de gaz French Gázüzemű újratöltés Hungarian Pengisian peluru dengan gas ID Sottrazione di gas Italian
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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.