This expert guide from the School of the American Rifle details how to identify and address rough carrier key bores in AR-15 bolt carrier groups. The instructor, demonstrating expert knowledge, explains how these manufacturing defects, particularly on Colt components, can lead to premature wear on the gas tube and reduced reliability. Solutions involve replacing the defective carrier key to ensure smooth operation and longevity of the firearm.
Brandon Herrera, an AK-platform expert, critically analyzes a .22 LR conversion kit for AK-pattern rifles. He details significant reliability issues including feed failures, extractor malfunctions, and dangerous 'runaway' full-auto fire caused by hammer follow. The kit exhibits poor machining, leading Herrera to deem it unreliable and unrecommendable despite its low price point.
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