This guide details how to fix AR-15 gas issues by replacing the gas tube with one featuring a specific port size, such as the 0.070-inch option from Black River Tactical. This method aims to regulate gas flow, correcting ejection patterns without needing an adjustable gas block. The process involves disassembling the upper receiver, swapping the gas tube, and reassembling, with a focus on achieving a 3:30-4:00 o'clock ejection pattern for optimal performance.
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