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Product Description:
This BCA AR-10 complete .308 rifle length upper features a 20” black nitride stainless steel heavy barrel with Bear Claw flutes and a twist rate of 1:10. It includes a new M-LOK split rail, an M4 flat-top billet receiver, a bolt carrier group, 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.
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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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