This comprehensive guide from AT3 Tactical details the process of building an AR9 (Pistol Caliber Carbine). It covers essential component selection, including understanding terminology, choosing between Glock and Colt magazines, selecting dedicated upper and lower receivers, and specifying barrels, bolt carrier groups, muzzle devices, charging handles, handguards, and triggers. The series emphasizes practical considerations for reliability, maneuverability, and performance.
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