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American Tactical 410 Upper Kit converts your AR into a .410 shotgun upper. Includes upper, buffer and magazine. 18 inch barrel with a 2.5 inch chamber, 3 oz buffer, 5 round magazine, adjustable gas system, modified choke, 13 inch M-LOK rail, and flip up sights. Optic-ready.
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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.
6 min read