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BC-10 .22-250 Right Side Charging Upper combines a 20 inch 416R stainless steel heavy barrel with a 1:14 twist and rifle-length gas system. It features a 15 inch MLOK split rail handguard, an M4 flat-top billet upper receiver, and a Bear Creek Arsenal AR-10 bolt carrier group with a flash hider and a side charging handle (Gen 2). Compatible with 1st gen DPMS low-profile AR-10 lowers. This is a complete upper assembly (no magazine included). Variations may occur in the skeletonized section of the handguard/flash hider you receive.
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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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