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This BCA AR-10 complete AR-10 upper has a 24" black nitride lightweight barrel, and features a 1:10 twist rate, with a rifle length gas system. This upper features our lightweight barrel profile which reduces weight by 1 lb over traditional contours. It includes the new 15" MLOK split rail, an M4 flat-top billet upper receiver, a BCA AR10 bolt carrier group, a flash hider, and a right-side charging handle (Gen 2) patent pending. This .308 upper is compatible with 1st gen DPMS low profile lowers. Magazine not included.
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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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