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Aero Precision M4E1 Stripped Lower Receiver. Machined from 7075-T6 forged aluminum and finished in Anodized Black. Compatible with standard MIL-SPEC AR-15 components and magazines. Features threaded bolt catch roll pin, integrated trigger guard, upper tension screw, threaded takedown pin detent recess, increased magwell flare, and milled to accept short-throw safety selectors. Made in America. Weight approximately 8.61 oz.
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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 guide to component strategies for left-handed shooters, left-eye dominant right-handed shooters, and those managing eye/hand dominance mismatches. Covers ambi uppers, charging handles, gas system tuning, and real-world tradeoffs.
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