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This BC-10 complete .308 rifle length upper has a stainless steel lightweight barrel and features a twist rate. It includes the new MLOK split rail, an M4 flat-top billet receiver, bolt carrier group, flash hider, and right-side action charging handle.
WARNING: This product can expose you to chemicals, such as lead and other petroleum products, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to the California P65 Warning site.
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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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