When assembling an AR-15 intended for rigorous use—whether facing high round counts, harsh conditions, or sustained reliability demands—the bolt carrier group emerges as the foundational component. It drives the rifle’s operation, managing the critical sequence of locking, unlocking, extracting, ejecting, and chambering rounds. A subpar bolt carrier group risks undermining the entire system, while a … Continue reading The Bolt Carrier Group: The Cornerstone of a Hard-Use AR-15