This BUILD BOX bonus video focuses on the maintenance of a firearm's Bolt Carrier Group (BCG). Host Chris Cerino demonstrates how to identify when a BCG requires attention, covering procedures like replacing gas rings and performing BCG testing. The episode is sponsored by Aero Precision, Ballistic Advantage, and Stag Arms. BUILD BOX is a DIY firearm show airing on the Outdoor Channel, and viewers are encouraged to enter the Ultimate Builder Giveaway for a chance to win prizes from various firearm brands.
This guide details the effects of neglecting AR-15 maintenance, particularly with suppressed use. Expert Trevor demonstrates how significant carbon buildup can impact components like the safety selector and Bolt Carrier Group (BCG). A critical gas ring integrity test is shown, revealing worn rings that compromise the BCG's seal. Despite heavy fouling, the rifle's functionality is tested, highlighting the importance of regular cleaning and component checks for sustained reliability.
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