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gas block front sight
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.
This is a used gas block flip up front sight combo. Approx 1000 rounds through it, nothing wrong with it, never had an issue with this DI system, upgrading to a new piston system and done need this anymore. Includes a Carbine length gas tube already pinned. F2F in Vancouver/Camas/Washougal...