This comprehensive guide details an in-depth autopsy of an AR-15 upper receiver and a SOLGW Scalper Bolt Carrier Group (BCG) to diagnose potential corrosion issues. The process involves detailed visual inspection, borescoping the barrel, and extensive gauging of BCG components. Key findings include worn gas rings, minor pitting on the bolt face, and potential light corrosion in the barrel's rifling, likely stemming from ammunition or environmental factors. The guide emphasizes thorough cleaning and inspection to ensure firearm reliability and longevity.
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