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This BC-10 AR-10 complete upper assembly features a 16 inch Parkerized heavy barrel with a 1:10 twist, mid-length gas system, and a 15 inch MLOK split rail handguard. It includes an M4 flat-top billet upper receiver, a BCA AR10 bolt carrier group, a flash hider, and a right-side charging (Gen2) handle. This 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.
6 min read