This video announces the release of the School of the American Rifle's AR-15 Bolt Carrier Group (BCG) and Gas System Gauge Set. These gauges are designed to measure critical dimensions of the BCG, including the carrier body, bolt tail, and gas key, to assess efficiency and proper function. The set also includes pin gauges for carrier key alignment and a gas path gauge to check for obstructions. While some specialized gauges are not yet available due to manufacturing challenges, the released set aims to provide users with a deeper understanding of their AR-15's internal workings and potential gas system inefficiencies.
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