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Black Engraved Billet Lower Featuring UTG Tactical Stock
The BCA lower receiver is fully machined, anodized black and billet. Equipped with a M4 collapsable stock and an A2 grip, this complete lower assembly is ready for your next build. Bear Creek Arsenal AR-15 billet lower assemblies are made from 7075 aircraft-grade aluminum billets.
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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.
12 min read
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