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Aero Precision Complete Upper Receiver M4E1-T SM12.7 5.56x45mm NATO 13.9in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Cerakote FDE. The S-ONE line of handguards are designed with size and weight in mind providing the perfect addition to your lightweight build. Our proprietary ATLAS attachment system is a durable and dependable mounting platform maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguar...
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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