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BC-10 AR-10 complete upper assembly featuring a 20 inch 416R stainless SOCOM barrel with straight flutes and a 1:10 twist. It uses a billet upper receiver and a 15 inch M-LOK split-rail handguard. Includes an upper parts kit with dust cover and forward assist. Barrel finish is stainless steel with a 5/8-24 thread pitch. Caliber is .308. Receiver material is billet. Color is Anodized - Default. Weight is approximately 8.2 lb. Platform AR-10 with rifle length gas system.
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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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