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AR-15 billet lower receiver by SilencerCo SCO-15. Made from 7075-T6 aluminum with Type 3 hard coat anodized finish. Features integral ambidextrous anti-rotation sling cups at the rear of the receiver, proprietary ambidextrous bolt catch, enlarged integral trigger guard, and a flared magazine well. Designed for use with standard mil-spec lower parts kits and buffer assemblies. 45- to 90-degree fire selector window for short-throw fire selectors.
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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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