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ANDERSON Ext 10.5" 300 Blackout Upper with an adjustable gas block. Includes a 10.5" 300 AAC Blackout heavy barrel, .1015 gas port, pistol-length gas system, 1:8 twist, Parkerized finish, forged upper receiver, and Anderson EXT hand guard (pistol length). Knight Stalker flash hider installed. No bolt carrier group or charging handle.
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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