The Anatomy of a Bolt Carrier Group (BCG)
The bolt carrier group (BCG) is the heart of the AR-15 platform, driving its semi-automatic operation. Understanding its anatomy is crucial for maintenance, troubleshooting, and optimizing performance. This guide breaks down each component of the BCG and its function in the system. What is a Bolt Carrier Group? The BCG is a self-contained assembly within the upper receiver that houses several key components. It manages cycling by extracting spent casings, chambering new rounds, and resetting