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Yankee Hill Machine AR-15 Gas Block, .750 bore, low-profile, 0.950 in length; mil-spec phosphate finish; two-screw clamp; Made in USA.
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A comprehensive overview of every major component in an AR-15 build—including what's inside bolt carrier groups and parts kits—organized by assembly for new builders.
12 min read
Guide
A neutral explanation of gas system length tradeoffs, port pressures, and how these design decisions affect reliability, recoil, and parts wear.
5 min read