This video details how to fix a severely over-gassed 12.5-inch AR-15 upper receiver, identified by its aggressive recoil and ejection. The primary issue stems from a massive 0.093-inch gas port on the barrel. The presenter demonstrates the effectiveness of the BRT EZ Tune Gas Tube, which features a smaller, pre-drilled gas port to regulate gas flow, transforming the firearm into a pleasant shooting experience.
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