This video from Brownells Gun Tech™ explains the concept of 'dwell time' in AR-15 firearms. It details how the duration that combustion gases act on the operating system is crucial for diagnosing cycling malfunctions and selecting the appropriate gas system for AR-15 builds. The video highlights that gas system length (Pistol, Carbine, Mid-Length, Rifle) is a primary indicator of dwell time, with shorter systems generally experiencing higher gas pressure due to the gas port being closer to the chamber.
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