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This BC-10 AR-10 complete .308 rifle length upper features a black nitride SOCOM barrel with a 1:10 twist rate. It comes with a new MLOK split rail, an M4 flat-top billet receiver, a bolt carrier group, a flash hider, and a right-side action charging handle.
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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