This guide details how to properly tune an adjustable gas block on an AR-15 or AR-10 platform. The process involves starting with the gas block fully open and incrementally closing it (to the left) while firing single shots. The optimal setting is achieved when the firearm reliably cycles, locks the bolt open, and ejects brass at the 3:00 position. This tuning process helps mitigate recoil and keeps the firearm cleaner by reducing excess gas.
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